Rapid Review Flashcards
Abdominal pain, ascites, hepatomegaly
Budd-Chiari syndrome (posthepatic venous thrombosis)
Abdominal pain, diarrhea, leukocytosis, recent antibiotic use
Clostridium difficile infection
Achilles tendon xanthoma
Familial hypercholesterolemia (? LDL receptor signaling)
Adrenal hemorrhage, hypotension, DIC
Waterhouse-Friderichsen syndrome (meningococcemia)
Anaphylaxis following blood transfusion
IgA deficiency
Anterior “drawer sign” (+)
Anterior cruciate ligament injury
Arachnodactyly, lens dislocation, aortic dissection, hyperflexible joints
Marfan syndrome (fibrillin defect)
Athlete with polycythemia
2° to erythropoietin injection
Back pain, fever, night sweats
Pott disease (vertebral TB)
Bilateral acoustic schwannomas
Neurofibromatosis type 2
Bilateral hilar adenopathy, uveitis
Sarcoidosis (noncaseating granulomas)
Black eschar on face of patient with diabetic ketoacidosis
Mucor or Rhizopus fungal infection
Blue sclera
Osteogenesis imperfecta (type I collagen defect)
Bluish line on gingiva
Burton line (lead poisoning)
Bone pain, bone enlargement, arthritis
Paget disease of bone (? osteoblastic and osteoclastic activity)
Bounding pulses, diastolic heart murmur, head bobbing
Aortic regurgitation
Butterfly facial rash and Raynaud phenomenon in a young female
Systemic lupus erythematosus
Cafe?-au-lait spots, Lisch nodules (iris hamartoma), cutaneous neurofibromas, pheochromocytomas, optic gliomas
Neurofibromatosis type I, pheochromocytoma, optic gliomas
Cafe?-au-lait spots (unilateral), polyostotic fibrous dysplasia, precocious puberty, multiple endocrine abnormalities
McCune-Albright syndrome (mosaic G-protein signaling mutation)
Calf pseudohypertrophy
Muscular dystrophy (most commonly Duchenne, due to X-linked recessive frameshift mutation of dystrophin gene)
Cervical lymphadenopathy, desquamating rash, coronary aneurysms, red conjunctivae and tongue
Kawasaki disease (treat with IVIG and aspirin)
Cherry-red spots on macula
Tay-Sachs (ganglioside accumulation) or Niemann-Pick (sphingomyelin accumulation), central retinal artery occlusion
Chest pain on exertion
Angina (stable: with moderate exertion; unstable: with minimal exertion or at rest)
Chest pain, pericardial effusion/friction rub, persistent fever following MI
Dressler syndrome (autoimmune-mediated post-MI fibrinous pericarditis, 2-12 weeks after acute episode)
Chest pain with ST depressions on EKG
Unstable angina (troponins ?) or NSTEMI (troponins +)
Child uses arms to stand up from squat
Gowers sign (Duchenne muscular dystrophy)
Child with fever later develops red rash on face that spreads to body
Slapped cheeks (erythema infectiosum/fifth disease: parvovirus B19)
Chorea, dementia, caudate degeneration
Huntington disease (autosomal dominant CAG repeat expansion)
Chorioretinitis, hydrocephalus, intracranial calcifications
Congenital toxoplasmosis
Chronic exercise intolerance with myalgia, fatigue, painful cramps, myoglobinuria
McArdle disease (skeletal muscle glycogen phosphorylase deficiency)
Cold intolerance
Hypothyroidism
Conjugate horizontal gaze palsy, horizontal diplopia
Internuclear ophthalmoplegia (damage to MLF; may be unilateral or bilateral)
Continuous “machine-like” heart murmur
PDA (close with indomethacin; open or maintain with PGE analogs)
Cutaneous/dermal edema due to connective tissue deposition
Myxedema (caused by hypothyroidism, Graves disease [pretibial])
Cutaneous flushing, diarrhea, bronchospasm
Carcinoid syndrome (right-sided cardiac valvular lesions, 5-HIAA)
Dark purple skin/mouth nodules in a patient with AIDS
Kaposi sarcoma, associated with HHV-8
Deep, labored breathing/hyperventilation
Kussmaul respirations (diabetic ketoacidosis)
Dermatitis, dementia, diarrhea
Pellagra (niacin [vitamin B3] deficiency)
Dilated cardiomyopathy, edema, alcoholism or malnutrition
Wet beriberi (thiamine [vitamin B1] deficiency)
Dog or cat bite resulting in infection
Pasteurella multocida (cellulitis at inoculation site)
Dry eyes, dry mouth, arthritis
Sjo?gren syndrome (autoimmune destruction of exocrine glands)
Dysphagia (esophageal webs), glossitis, iron deficiency anemia
Plummer-Vinson syndrome (may progress to esophageal squamous cell carcinoma)
Elastic skin, hypermobility of joints, bleeding tendency
Ehlers-Danlos syndrome (type V collagen defect, type III collagen defect seen in vascular subtype of ED)
Enlarged, hard left supraclavicular node
Virchow node (abdominal metastasis)
Episodic vertigo, tinnitus, hearing loss
Meniere disease
Erythroderma, lymphadenopathy, hepatosplenomegaly, atypical T cells
Mycosis fungoides (cutaneous T-cell lymphoma) or Se?zary syndrome (mycosis fungoides + malignant T cells in blood)
Facial muscle spasm upon tapping
Chvostek sign (hypocalcemia)
Fat, female, forty, and fertile
Cholelithiasis (gallstones)
Fever, chills, headache, myalgia following antibiotic treatment for syphilis
Jarisch-Herxheimer reaction (rapid lysis of spirochetes results in endotoxin release)
Fever, cough, conjunctivitis, coryza, diffuse rash
Measles
Fever, night sweats, weight loss
B symptoms (staging) of lymphoma
Fibrous plaques in soft tissue of penis with abnormalcurvature
Peyronie disease (connective tissue disorder)
Golden brown rings around peripheral cornea
Kayser-Fleischer rings (copper accumulation from Wilson disease)
Gout, intellectual disability, self-mutilating behavior in a boy
Lesch-Nyhan syndrome (HGPRT deficiency, X-linked recessive)
Hamartomatous GI polyps, hyperpigmentation of mouth/feet/hands/genitalia
Peutz-Jeghers syndrome (inherited, benign polyposis can cause bowel obstruction; ? cancer risk, mainly GI)
Hepatosplenomegaly, pancytopenia, osteoporosis, aseptic necrosis of femur, bone crises
Gaucher disease (glucocerebrosidase deficiency)
Hereditary nephritis, sensorineural hearing loss, cataracts
Alport syndrome (mutation in collagen IV)
Hyperphagia, hypersexuality, hyperorality, hyperdocility
Klu?ver-Bucy syndrome (bilateral amygdala lesion)
Hyperreflexia, hypertonia, Babinski sign present
UMN damage
Hyporeflexia, hypotonia, atrophy, fasciculations
LMN damage
Hypoxemia, polycythemia, hypercapnia
Blue bloater (chronic bronchitis: hyperplasia of mucous cells)
Indurated, ulcerated genital lesion
Nonpainful: chancre (1° syphilis, Treponema pallidum) Painful, with exudate: chancroid (Haemophilus ducreyi)
Infant with “cherry-red” spot on macula, hepatosplenomegaly, and neurodegeneration
Niemann-Pick disease (genetic sphingomyelinase deficiency)
Infant with cleft lip/palate, microcephaly or holoprosencephaly, polydactyly, cutis aplasia
Patau syndrome (trisomy 13)
Infant with hypoglycemia, hepatomegaly
Cori disease (debranching enzyme deficiency) or Von Gierke disease (glucose-6-phosphatase deficiency, more severe)
Infant with microcephaly, rocker-bottom feet, clenched hands, and structural heart defect
Edwards syndrome (trisomy 18)
Jaundice, palpable distended non-tender gallbladder
Courvoisier sign (distal obstruction of biliary tree)
Large rash with bull’s-eye appearance
Erythema chronicum migrans from Ixodes tick bite (Lyme disease: Borrelia)
Lucid interval after traumatic brain injury
Epidural hematoma (middle meningeal artery rupture)
Male child, recurrent infections, no mature B cells
Bruton disease (X-linked agammaglobulinemia)
Mucosal bleeding and prolonged bleeding time
Glanzmann thrombasthenia (defect in platelet aggregation due to lack of GpIIb/IIIa)
Muffled heart sounds, distended neck veins, hypotension
Beck triad of cardiac tamponade
Multiple colon polyps, osteomas/soft tissue tumors, impacted/ supernumerary teeth
Gardner syndrome (subtype of FAP)
Myopathy (infantile hypertrophic cardiomyopathy), exercise intolerance
Pompe disease (lysosomal ?-1,4-glucosidase deficiency)
Neonate with arm paralysis following difficult birth
Erb-Duchenne palsy (superior trunk [C5-C6] brachial plexus injury: “waiter’s tip”)
No lactation postpartum, absent menstruation, cold intolerance
Sheehan syndrome (pituitary infarction)
Nystagmus, intention tremor, scanning speech, bilateral internuclear ophthalmoplegia
Multiple sclerosis
Painful blue fingers/toes, hemolytic anemia
Cold agglutinin disease (autoimmune hemolytic anemia caused by Mycoplasma pneumoniae, infectious mononucleosis, CLL)
Painful fingers/toes changing color from blue to white to red with cold or stress
Raynaud phenomenon (vasospasm in extremities)
Painful, raised red lesions on pads of fingers/toes
Osler nodes (infective endocarditis, immune complex deposition)
Painless erythematous lesions on palms and soles
Janeway lesions (infective endocarditis, septic emboli/ microabscesses)
Painless jaundice
Cancer of the pancreatic head obstructing bile duct
Palpable purpura on buttocks/legs, joint pain, abdominal pain (child), hematuria
Henoch-Scho?nlein purpura (IgA vasculitis affecting skin and kidneys)
Pancreatic, pituitary, parathyroid tumors
MEN 1 (autosomal dominant)
Periorbital and/or peripheral edema, proteinuria, hypoalbuminemia, hypercholesterolemia
Nephrotic syndrome
Pink complexion, dyspnea, hyperventilation
Pink puffer (emphysema: centriacinar [smoking], panacinar [?1-antitrypsin deficiency])
Polyuria, renal tubular acidosis type II, growth failure, electrolyte imbalances, hypophosphatemic rickets
Fanconi syndrome (multiple combined dysfunction of the proximal convoluted tubule)
Pruritic, purple, polygonal planar papules and plaques (6 P’s)
Lichen planus
Ptosis, miosis, anhidrosis
Horner syndrome (sympathetic chain lesion)
Pupil accommodates but doesn’t react
Argyll Robertson pupil (neurosyphilis)
Rapidly progressive limb weakness that ascends following GI/upper respiratory infection
Guillain-Barre? syndrome (acute inflammatory demyelinating polyradiculopathy subtype)
Rash on palms and soles
Coxsackie A, 2° syphilis, Rocky Mountain spotted fever
Recurrent cold (noninflamed) abscesses, unusual eczema, high serum IgE
Hyper-IgE syndrome (Job syndrome: neutrophil chemotaxis abnormality)
Red “currant jelly” sputum in alcoholic or diabetic patients
Klebsiella pneumoniae pneumonia
Red “currant jelly” stools
Acute mesenteric ischemia (adults), intussusception (children)
Red, itchy, swollen rash of nipple/areola
Paget disease of the breast (sign of underlying neoplasm)
Red urine in the morning, fragile RBCs
Paroxysmal nocturnal hemoglobinuria
Renal cell carcinoma (bilateral), hemangioblastomas, angiomatosis, pheochromocytoma
von Hippel-Lindau disease (dominant tumor suppressor gene mutation)
Resting tremor, rigidity, akinesia, postural instability, shuffling gait
Parkinson disease (loss of dopaminergic neurons in substantia nigra pars compacta)
Retinal hemorrhages with pale centers
Roth spots (bacterial endocarditis)
Severe jaundice in neonate
Crigler-Najjar syndrome (congenital unconjugated hyperbilirubinemia)
Severe RLQ pain with palpation of LLQ
Rovsing sign (acute appendicitis)
Severe RLQ pain with rebound tenderness
McBurney sign (acute appendicitis)
Short stature, cafe? au lait spots, thumb/radial defects, ? incidence of tumors/leukemia, aplastic anemia
Fanconi anemia (genetic loss of DNA crosslink repair; often progresses to AML)
Single palmar crease
Down syndrome
Situs inversus, chronic sinusitis, bronchiectasis, infertility
Kartagener syndrome (dynein arm defect affecting cilia)
Skin hyperpigmentation, hypotension, fatigue
1° adrenocortical insufficiency (e.g., Addison disease) causes ACTH and ?-MSH production)
Slow, progressive muscle weakness in boys
Becker muscular dystrophy (X-linked missense mutation in dystrophin; less severe than Duchenne)
Small, irregular red spots on buccal/lingual mucosa with blue-white centers
Koplik spots (measles; rubeola virus)
Smooth, moist, painless, wart-like white lesions on genitals
Condylomata lata (2° syphilis)
Splinter hemorrhages in fingernails
Bacterial endocarditis
Strawberry tongue
Scarlet fever, Kawasaki disease
Streak ovaries, congenital heart disease, horseshoe kidney, cystic hygroma at birth, short stature, webbed neck, lymphedema
Turner syndrome (45,XO)
Sudden swollen/painful big toe joint, tophi
Gout/podagra (hyperuricemia)
Swollen gums, mucosal bleeding, poor wound healing, petechiae
Scurvy (vitamin C deficiency: can’t hydroxylate proline/lysine for collagen synthesis)
Swollen, hard, painful finger joints
Osteoarthritis (osteophytes on PIP [Bouchard nodes], DIP [Heberden nodes])
Systolic ejection murmur (crescendo-decrescendo)
Aortic stenosis
Telangiectasias, recurrent epistaxis, skin discoloration, arteriovenous malformations, GI bleeding, hematuria
Osler-Weber-Rendu syndrome
Thyroid and parathyroid tumors, pheochromocytoma
MEN 2A (autosomal dominant RET mutation)
Thyroid tumors, pheochromocytoma, ganglioneuromatosis
MEN 2B (autosomal dominant RET mutation)
Toe extension/fanning upon plantar scrape
Babinski sign (UMN lesion)
Unilateral facial drooping involving forehead
LMN facial nerve (CN VII) palsy; UMN lesions spare the forehead
Urethritis, conjunctivitis, arthritis in a male
Reactive arthritis associated with HLA-B27
Vascular birthmark (port-wine stain) of the face
Nevus flammeus (benign, but associated with Sturge-Weber syndrome)
Vomiting blood following gastroesophageal lacerations
Mallory-Weiss syndrome (alcoholic and bulimic patients)
Weight loss, diarrhea, arthritis, fever, adenopathy
Whipple disease (Tropheryma whipplei)
Worst headache of my life
Subarachnoid hemorrhage
Anticentromere antibodies
Scleroderma (CREST)
Anti-desmoglein (epithelial) antibodies
Pemphigus vulgaris (blistering)
Anti-glomerular basement membrane antibodies
Goodpasture syndrome (glomerulonephritis and hemoptysis)
Antihistone antibodies
Drug-induced SLE (e.g., hydralazine, isoniazid, phenytoin, procainamide)
Anti-IgG antibodies
Rheumatoid arthritis (systemic inflammation, joint pannus, boutonnie?re deformity)
Antimitochondrial antibodies (AMAs)
1° biliary cirrhosis (female, cholestasis, portal hypertension)
Antineutrophil cytoplasmic antibodies (ANCAs)
Microscopic polyangiitis and eosinophilic granulomatosis with polyangiitis (Churg-Strauss syndrome) (MPO-ANCA/ p-ANCA); granulomatosis with polyangiitis (Wegener; PR3- ANCA/c-ANCA)
Antinuclear antibodies (ANAs: anti-Smith and anti-dsDNA)
SLE (type III hypersensitivity)
Antiplatelet antibodies
Idiopathic thrombocytopenic purpura
Anti-topoisomerase antibodies
Diffuse systemic scleroderma
Anti-transglutaminase/anti-gliadin/anti-endomysial antibodies
Celiac disease (diarrhea, weight loss)
Apple core lesion on barium enema x-ray
Colorectal cancer (usually left-sided)
Atypical lymphocytes
EBV
Azurophilic peroxidase ? granular inclusions in granulocytes and myeloblasts
Auer rods (AML, especially the promyelocytic [M3] type)
Bacitracin response
Sensitive: S. pyogenes (group A); resistant: S. agalactiae (group B)
Bamboo spine on x-ray
Ankylosing spondylitis (chronic inflammatory arthritis: HLA-B27)
Basophilic nuclear remnants in RBCs
Howell-Jolly bodies (due to splenectomy or nonfunctional spleen)
Basophilic stippling of RBCs
Lead poisoning or sideroblastic anemia
Bloody or yellow tap on lumbar puncture
Subarachnoid hemorrhage
Boot-shaped heart on x-ray
Tetralogy of Fallot (due to RVH)
Branching gram-positive rods with sulfur granules
Actinomyces israelii
Bronchogenic apical lung tumor on imaging
Pancoast tumor (can compress cervical sympathetic chain and cause Horner syndrome)
Brown tumor of bone
Hyperparathyroidism or osteitis fibrosa cystica (deposited hemosiderin from hemorrhage gives brown color)
Cardiomegaly with apical atrophy
Chagas disease (Trypanosoma cruzi)
Cellular crescents in Bowman capsule
Rapidly progressive crescentic glomerulonephritis
Chocolate cyst of ovary
Endometriosis (frequently involves both ovaries)
Circular grouping of dark tumor cells surrounding pale neurofibrils
Homer-Wright rosettes (neuroblastoma, medulloblastoma)
Colonies of mucoid Pseudomonas in lungs
Cystic fibrosis (autosomal recessive mutation in CFTR gene fat-soluble vitamin deficiency and mucous plugs)
? AFP in amniotic fluid/maternal serum
Down syndrome or other chromosomal abnormalities
Degeneration of dorsal column fibers
Tabes dorsalis (3° syphilis), subacute combined degeneration (dorsal columns, lateral corticospinal, spinocerebellar tracts affected)
Delta wave on EKG, short PR interval, supraventricular tachycardia
Wolf-Parkinson-White syndrome (Bundle of Kent bypasses AV node)
Depigmentation of neurons in substantia nigra
Parkinson disease (basal ganglia disorder: rigidity, resting tremor, bradykinesia)
Desquamated epithelium casts in sputum
Curschmann spirals (bronchial asthma; can result in whorled mucous plugs)
Disarrayed granulosa cells arranged around collections of eosinophilic fluid
Call-Exner bodies (granulosa cell tumor of the ovary)
Dysplastic squamous cervical cells with “raisinoid” nuclei and hyperchromasia
Koilocytes (HPV: predisposes to cervical cancer)
Electrical alternans (alternating amplitude on EKG)
Pericardial tamponade
Enlarged cells with intranuclear inclusion bodies
Owl eye appearance of CMV
Enlarged thyroid cells with ground-glass nuclei with central clearing
Orphan Annie eyes nuclei (papillary carcinoma of the thyroid)
Eosinophilic cytoplasmic inclusion in liver cell
Mallory body (alcoholic liver disease)
Eosinophilic cytoplasmic inclusion in nerve cell
Lewy body (Parkinson disease)
Eosinophilic globule in liver
Councilman body (viral hepatitis, yellow fever), represents hepatocyte undergoing apoptosis
Eosinophilic inclusion bodies in cytoplasm of hippocampal and cerebellar neurons
Negri bodies of rabies
Extracellular amyloid deposition in gray matter of brain
Senile plaques (Alzheimer disease)
Giant B cells with bilobed nuclei with prominent inclusions (“owl’s eye”)
Reed-Sternberg cells (Hodgkin lymphoma)
Glomerulus-like structure surrounding vessel in germ cells
Schiller-Duval bodies (yolk sac tumor)
Hair on end (“Crew-cut”) appearance on x-ray
?-thalassemia, sickle cell disease (marrow expansion)
hCG elevated
Choriocarcinoma, hydatidiform mole (occurs with and without embryo, and multiple pregnancy)
Heart nodules (granulomatous)
Aschoff bodies (rheumatic fever)
Heterophile antibodies
Infectious mononucleosis (EBV)
Hexagonal, double-pointed, needle-like crystals in bronchial secretions
Bronchial asthma (Charcot-Leyden crystals: eosinophilic granules)
High level of d-dimers
DVT, PE, DIC
Hilar lymphadenopathy, peripheral granulomatous lesion in middle or lower lung lobes (can calcify)
Ghon complex (1° TB: Mycobacterium bacilli)
Honeycomb lung on x-ray or CT
Interstitial pulmonary fibrosis
Hypercoagulability (leading to migrating DVTs and vasculitis)
Trousseau syndrome (adenocarcinoma of pancreas or lung)
Hypersegmented neutrophils
Megaloblastic anemia (B12 deficiency: neurologic symptoms; folate deficiency: no neurologic symptoms)
Hypertension, hypokalemia, metabolic alkalosis
Conn syndrome (primary hyperaldosteronism)
Hypochromic, microcytic anemia
Iron deficiency anemia, lead poisoning, thalassemia (fetal hemoglobin sometimes present)
Increased AFP in amniotic fluid/maternal serum
Dating error, anencephaly, spina bifida (neural tube defects)
Increased uric acid levels
Gout, Lesch-Nyhan syndrome, tumor lysis syndrome, loop and thiazide diuretics
Intranuclear eosinophilic droplet-like bodies
Cowdry type A bodies (HSV or VZV)
Iron-containing nodules in alveolar septum
Ferruginous bodies (asbestosis: chance of mesothelioma)
Keratin pearls on a skin biopsy
Squamous cell carcinoma
Large granules in phagocytes, immunodeficiency
Che?diak-Higashi disease (congenital failure of phagolysosome formation)
Lead pipe appearance of colon on abdominal imaging
Ulcerative colitis (loss of haustra)
Linear appearance of IgG deposition on glomerular and alveolar basement membranes
Goodpasture syndrome
Low serum ceruloplasmin
Wilson disease (hepatolenticular degeneration)
Lumpy bumpy appearance of glomeruli on immunofluorescence
Poststreptococcal glomerulonephritis (due to deposition of IgG, IgM, and C3)
Lytic (“punched-out”) bone lesions on x-ray
Multiple myeloma
Mammary gland (“blue domed”) cyst
Fibrocystic change of the breast
Monoclonal antibody spike
Multiple myeloma (usually IgG or IgA), Monoclonal gammopathy of undetermined significance (MGUS consequence of aging), Waldenstro?m (M protein = IgM) macroglobulinemia, Primary amyloidosis
Mucin-filled cell with peripheral nucleus
Signet ring (gastric carcinoma)
Narrowing of bowel lumen on barium x-ray
String sign (Crohn disease)
Necrotizing vasculitis (lungs) and necrotizing glomerulonephritis
Granulomatosis with polyangiitis (Wegener; PR3-ANCA/ c-ANCA) and Goodpasture syndrome (anti-basement membrane antibodies)
Needle-shaped, negatively birefringent crystals
Gout (monosodium urate crystals)
Nodular hyaline deposits in glomeruli
Kimmelstiel-Wilson nodules (diabetic nephropathy)
Novobiocin response
Sensitive: S. epidermidis; resistant: S. saprophyticus
Nutmeg appearance of liver
Chronic passive congestion of liver due to right heart failure or Budd-Chiari syndrome
Onion skin periosteal reaction
Ewing sarcoma (malignant small blue cell tumor)
Optochin response
Sensitive: S. pneumoniae; resistant: viridans streptococci (S. mutans, S. sanguis)
Periosteum raised from bone, creating triangular area
Codman triangle on x-ray, Ewing sarcoma, pyogenic osteomyelitis)
Podocyte fusion or “effacement” on electron microscopy
Minimal change disease (child with nephrotic syndrome)
Polished, “ivory-like” appearance of bone at cartilage erosion
Eburnation (osteoarthritis resulting in bony sclerosis)
Protein aggregates in neurons from hyperphosphorylation of tau protein
Neurofibrillary tangles (Alzheimer disease) and Pick bodies (Pick disease)
Psammoma bodies
Meningiomas, papillary thyroid carcinoma, mesothelioma, papillary serous carcinoma of the endometrium and ovary
Pseudopalisading tumor cells on brain biopsy
Glioblastoma multiforme
RBC casts in urine
Glomerulonephritis
Rectangular, crystal-like, cytoplasmic inclusions in Leydig cells
Reinke crystals (Leydig cell tumor)
Recurrent infections, eczema, thrombocytopenia
Wiskott-Aldrich syndrome
Renal epithelial casts in urine
Intrinsic renal failure (e.g., ischemia or toxic injury)
Rhomboid crystals, positively birefringent
Pseudogout (calcium pyrophosphate dihydrate crystals)
Rib notching
Coarctation of the aorta
Ring-enhancing brain lesion in AIDS
Toxoplasma gondii, CNS lymphoma
Sheets of medium-sized lymphoid cells with scattered pale, tingible body-laden macrophages (“starry sky” histology)
Burkitt lymphoma (t[8:14] c-myc activation, associated with EBV; “starry sky” made up of malignant cells)
Silver-staining spherical aggregation of tau proteins in neurons
Pick bodies (Pick disease: progressive dementia, changes in personality)
Soap bubble in femur or tibia on x-ray
Giant cell tumor of bone (generally benign)
Spikes on basement membrane, “dome-like” subepithelial deposits
Membranous nephropathy (nephrotic syndrome)
Stacks of RBCs
Rouleaux formation (high ESR, multiple myeloma)
Steeple sign on CXR
Croup (parainfluenza virus)
Stippled vaginal epithelial cells
Clue cells (Gardnerella vaginalis)
Streptococcus bovis bacteremia
Colon cancer
Tennis racket-shaped cytoplasmic organelles (EM) in Langerhans cells
Birbeck granules (Langerhans cell histiocytosis)
Thousands of polyps on colonoscopy
Familial adenomatous polyposis (autosomal dominant, mutation of APC gene)
Thrombi made of white/red layers
Lines of Zahn (arterial thrombus, layers of platelets/RBCs)
Thumb sign on lateral neck x-ray
Epiglottitis (Haemophilus influenzae)
Thyroid-like appearance of kidney
Chronic pyelonephritis (usually due to recurrent infections)
Tram-track appearance of capillary loops of glomerular basement membranes on light microscopy
Membranoproliferative glomerulonephritis
Triglyceride accumulation in liver cell vacuoles
Fatty liver disease (alcoholic or metabolic syndrome)
Waxy casts with very low urine flow
Chronic end-stage renal disease
WBC casts in urine
Acute pyelonephritis
WBCs that look “smudged”
CLL (almost always B cell)
Wire loop glomerular capillary appearance on light microscopy
Diffuse proliferative glomerulonephritis (usually seen with lupus)
Yellowish CSF
Xanthochromia (e.g., due to subarachnoid hemorrhage)
Absence seizures (treatment)
Ethosuximide
Acute gout attack (treatment)
NSAIDs, colchicine, glucocorticoids
Acute promyelocytic leukemia (M3) (treatment)
All-trans retinoic acid
ADHD (treatment)
Methylphenidate, CBT, atomoxetine
Alcoholism (treatment)
Disulfiram, acamprosate, naltrexone, supportive care
Alcohol withdrawal (treatment)
Long-acting benzodiazepines
Anorexia (treatment)
Nutrition, psychotherapy, mirtazapine
Anticoagulation during pregnancy (treatment)
Heparin
Arrhythmia in damaged cardiac tissue (treatment)
Class IB antiarrhythmic (lidocaine, mexiletine)
B12 deficiency (treatment)
Vitamin B12 supplementation (work up cause with Schilling test)
Benign prostatic hyperplasia (treatment)
?1-antagonists, 5?-reductase inhibitors, PDE-5 inhibitors
Bipolar disorder (treatment)
Mood stabilizers (e.g., lithium, valproic acid, carbamazepine), atypical antipsychotics
Breast cancer in postmenopausal woman (treatment)
Aromatase inhibitor (anastrozole)
Buerger disease (treatment)
Smoking cessation
Bulimia nervosa (treatment)
SSRIs
Candida albicans (treatment)
Topical azoles (vaginitis); nystatin, fluconazole, caspofungin (oral/esophageal); fluconazole, caspofungin, amphotericin B (systemic)
Carcinoid syndrome (treatment)
Octreotide
Chlamydia trachomatis (treatment)
Doxycycline (+ ceftriaxone for gonorrhea coinfection), erythromycin eye drops (prophylaxis in infants)
Chronic gout (treatment)
Xanthine oxidase inhibitors (e.g., allopurinol, febuxostat)
Chronic hepatitis B or C (treatment)
IFN-? (HBV and HCV); ribavirin, simeprevir, sofosbuvir (HCV)
Chronic myelogenous leukemia (treatment)
Imatinib
Clostridium botulinum (treatment)
Antitoxin
Clostridium difficile (treatment)
Oral metronidazole; if refractory, oral vancomycin
Clostridium tetani (treatment)
Antitoxin
CMV (treatment)
Ganciclovir, foscarnet, cidofovir
Crohn disease (treatment)
Corticosteroids, infliximab, azathioprine
Cryptococcus neoformans (treatment)
Fluconazole (in AIDS patients)
Cyclophosphamide-induced hemorrhagic cystitis (treatment)
Mesna
Depression (treatment)
SSRIs (first-line)
Diabetes insipidus (treatment)
Desmopressin (central); hydrochlorothiazide, indomethacin, amiloride (nephrogenic)
Diabetes mellitus type 1 (treatment)
Dietary intervention (low carbohydrate) + insulin replacement
Diabetes mellitus type 2 (treatment)
Dietary intervention, oral hypoglycemics, and insulin (if refractory)
Diabetic ketoacidosis (treatment)
Fluids, insulin, K+
Enterococci (treatment)
Vancomycin, aminopenicillins/cephalosporins
Erectile dysfunction (treatment)
Sildenafil, tadalafil, vardenafil
ER ? breast cancer (treatment)
Tamoxifen
Ethylene glycol/methanol intoxication (treatment)
Fomepizole (alcohol dehydrogenase inhibitor)
Haemophilus influenzae (B) (treatment)
Rifampin (prophylaxis)
Generalized anxiety disorder (treatment)
SSRIs, SNRIs (first line); buspirone (second line)
Granulomatosis with polyangiitis (Wegener) (treatment)
Cyclophosphamide, corticosteroids
Heparin reversal (treatment)
Protamine sulfate
HER2/neu ? breast cancer (treatment)
Trastuzumab
Hyperaldosteronism (treatment)
Spironolactone
Hypercholesterolemia (treatment)
Statin (first-line)
Hypertriglyceridemia (treatment)
Fibrate
Immediate anticoagulation (treatment)
Heparin
Infertility (treatment)
Leuprolide, GnRH (pulsatile), clomiphene
Influenza (treatment)
Oseltamivir, zanamivir
Kawasaki disease (treatment)
IVIG, high-dose aspirin
Legionella pneumophila (treatment)
Macrolides (e.g., azithromycin)
Long-term anticoagulation (treatment)
Warfarin, dabigatran, rivaroxaban and apixaban
Malaria (treatment)
Chloroquine, mefloquine, atovaquone/proguanil (for blood schizont), primaquine (for liver hypnozoite)
Malignant hyperthermia (treatment)
Dantrolene
Medical abortion (treatment)
Mifepristone
Migraine (treatment)
Abortive therapies (e.g., sumatriptan, NSAIDs); prophylaxis (e.g., propranolol, topiramate, CCBs, amitriptyline)
Multiple sclerosis (treatment)
Disease-modifying therapies (e.g., ?-interferon, natalizumab); for acute flares, use IV steroids
Mycobacterium tuberculosis (treatment)
RIPE (rifampin, isoniazid, pyrazinamide, ethambutol)
Neisseria gonorrhoeae (treatment)
Ceftriaxone (add doxycycline to cover likely concurrent C. trachomatis)
Neisseria meningitidis (treatment)
Penicillin/ceftriaxone, rifampin (prophylaxis)
Neural tube defect prevention (treatment)
Prenatal folic acid
Osteomalacia/rickets (treatment)
Vitamin D supplementation
Osteoporosis (treatment)
Calcium/vitamin D supplementation (prophylaxis); bisphosphonates, PTH analogs, SERMs, calcitonin, denosumab (treatment)
Patent ductus arteriosus (treatment)
Close with indomethacin; open or maintain with PGE analogs
Pheochromocytoma (treatment)
?-antagonists (e.g., phenoxybenzamine)
Pneumocystis jirovecii (treatment)
TMP-SMX (prophylaxis in AIDS patient)
Prolactinoma (treatment)
Cabergoline/bromocriptine (dopamine agonists)
Prostate adenocarcinoma/uterine fibroids (treatment)
Leuprolide, GnRH (continuous)
Prostate adenocarcinoma (treatment)
Flutamide
Pseudomonas aeruginosa (treatment)
Antipseudomonal penicillins, aminoglycosides, carbapenems
Pulmonary arterial hypertension (idiopathic) (treatment)
Sildenafil, bosentan, epoprostenol
Rickettsia rickettsii (treatment)
Doxycycline, chloramphenicol
Schizophrenia (negative symptoms) (treatment)
Atypical antipsychotics
Schizophrenia (positive symptoms) (treatment)
Typical and atypical antipsychotics
SIADH (treatment)
Fluid restriction, IV hypertonic saline, conivaptan/tolvaptan, demeclocycline
Sickle cell disease (treatment)
Hydroxyurea ( fetal hemoglobin)
Sporothrix schenckii (treatment)
Itraconazole, oral potassium iodide
Stable angina (treatment)
Sublingual nitroglycerin
Staphylococcus aureus (treatment)
MSSA: nafcillin, oxacillin, dicloxacillin (antistaphylococcal penicillins); MRSA: vancomycin, daptomycin, linezolid, ceftaroline
Streptococcus bovis (treatment)
Penicillin prophylaxis; evaluation for colon cancer if linked to endocarditis
Streptococcus pneumoniae (treatment)
Penicillin/cephalosporin (systemic infection, pneumonia), vancomycin (meningitis)
Streptococcus pyogenes (treatment)
Penicillin prophylaxis
Temporal arteritis (treatment)
High-dose steroids
Tonic-clonic seizures (treatment)
Levetiracetam, phenytoin, valproate, carbamazepine
Toxoplasma gondii (treatment)
Sulfadiazine + pyrimethamine
Treponema pallidum (treatment)
Penicillin
Trichomonas vaginalis (treatment)
Metronidazole (patient and partner)
Trigeminal neuralgia (tic douloureux) (treatment)
Carbamazepine
Ulcerative colitis (treatment)
5-ASA preparations (e.g., mesalamine), 6-mercaptopurine, infliximab, colectomy
UTI prophylaxis (treatment)
TMP-SMX
Warfarin reversal (treatment)
Fresh frozen plasma (acute), vitamin K (chronic)
Actinic (solar) keratosis (MCM cause/important assoc.)
Precursor to squamous cell carcinoma
Acute gastric ulcer associated with CNS injury (MCM cause/important assoc.)
Cushing ulcer (? intracranial pressure stimulates vagal gastric H+ secretion)
Acute gastric ulcer associated with severe burns (MCM cause/important assoc.)
Curling ulcer (greatly reduced plasma volume results in sloughing of gastric mucosa)
Alternating areas of transmural inflammation and normal colon (MCM cause/important assoc.)
Skip lesions (Crohn disease)
Aortic aneurysm, abdominal (MCM cause/important assoc.)
Atherosclerosis
Aortic aneurysm, ascending or arch (MCM cause/important assoc.)
3° syphilis (syphilitic aortitis), vasa vasorum destruction
Aortic aneurysm, thoracic (MCM cause/important assoc.)
Marfan syndrome (idiopathic cystic medial degeneration)
Aortic dissection (MCM cause/important assoc.)
Hypertension
Atrophy of the mammillary bodies (MCM cause/important assoc.)
Wernicke encephalopathy (thiamine deficiency causing ataxia, ophthalmoplegia, and confusion)
Autosplenectomy (fibrosis and shrinkage) (MCM cause/important assoc.)
Sickle cell disease (hemoglobin S)
Bacteria associated with gastritis, peptic ulcer disease, and stomach cancer (MCM cause/important assoc.)
H. pylori
Bacterial meningitis (adults and elderly) (MCM cause/important assoc.)
S. pneumoniae
Bacterial meningitis (newborns and kids) (MCM cause/important assoc.)
Group B streptococcus/E.coli (newborns), S. pneumoniae/N. meningitidis (kids/teens)
Bilateral ovarian metastases from gastric carcinoma (MCM cause/important assoc.)
Krukenberg tumor (mucin-secreting signet ring cells)
Bleeding disorder with GpIb deficiency (MCM cause/important assoc.)
Bernard-Soulier syndrome (defect in platelet adhesion to von Willebrand factor)
Brain tumor (adults) (MCM cause/important assoc.)
Supratentorial: metastasis, astrocytoma (including glioblastoma multiforme), meningioma, schwannoma
Brain tumor (kids) (MCM cause/important assoc.)
Infratentorial: medulloblastoma (cerebellum) or supratentorial: craniopharyngioma
Breast cancer (MCM cause/important assoc.)
Invasive ductal carcinoma
Breast mass (MCM cause/important assoc.)
Fibrocystic change, carcinoma (in postmenopausal women)
Breast tumor (benign) (MCM cause/important assoc.)
Fibroadenoma
Cardiac 1° tumor (kids) (MCM cause/important assoc.)
Rhabdomyoma, often seen in tuberous sclerosis
Cardiac manifestation of lupus (MCM cause/important assoc.)
Marantic/thrombotic endocarditis (nonbacterial)
Cardiac tumor (adults) (MCM cause/important assoc.)
Metastasis, myxoma (90% in left atrium; “ball and valve”)
Cerebellar tonsillar herniation (MCM cause/important assoc.)
Chiari II malformation
Chronic arrhythmia (MCM cause/important assoc.)
Atrial fibrillation (associated with high risk of emboli)
Chronic atrophic gastritis (autoimmune) (MCM cause/important assoc.)
Predisposition to gastric carcinoma (can also cause pernicious anemia)
Clear cell adenocarcinoma of the vagina (MCM cause/important assoc.)
DES exposure in utero
Congenital adrenal hyperplasia, hypotension (MCM cause/important assoc.)
21-hydroxylase deficiency
Congenital cardiac anomaly (MCM cause/important assoc.)
VSD
Congenital conjugated hyperbilirubinemia (black liver) (MCM cause/important assoc.)
Dubin-Johnson syndrome (inability of hepatocytes to secrete conjugated bilirubin into bile)
Constrictive pericarditis (MCM cause/important assoc.)
TB (developing world); idiopathic, viral illness (developed world)
Coronary artery involved in thrombosis (MCM cause/important assoc.)
LAD > RCA > circumflex
Cretinism (MCM cause/important assoc.)
Iodine deficit/congenital hypothyroidism
Cushing syndrome (MCM cause/important assoc.)
Iatrogenic (from corticosteroid therapy), Adrenocortical adenoma (secretes excess cortisol) , ACTH-secreting pituitary adenoma (Cushing disease) Paraneoplastic (due to ACTH secretion by tumors)
Cyanosis (early; less common) (MCM cause/important assoc.)
Tetralogy of Fallot, transposition of great vessels, truncus arteriosus
Cyanosis (late; more common) (MCM cause/important assoc.)
VSD, ASD, PDA
Death in CML (MCM cause/important assoc.)
Blast crisis
Death in SLE (MCM cause/important assoc.)
Lupus nephropathy
Dementia (MCM cause/important assoc.)
Alzheimer disease, multiple infarcts (vascular dementia)
Demyelinating disease in young women (MCM cause/important assoc.)
Multiple sclerosis
DIC (MCM cause/important assoc.)
Severe sepsis, obstetric complications, cancer, burns, trauma, major surgery
Dietary deficit (MCM cause/important assoc.)
Iron
Diverticulum in pharynx (MCM cause/important assoc.)
Zenker diverticulum (diagnosed by barium swallow)
Ejection click (MCM cause/important assoc.)
Aortic stenosis
Esophageal cancer (MCM cause/important assoc.)
Squamous cell carcinoma (worldwide); adenocarcinoma (U.S.)
Food poisoning (exotoxin mediated) (MCM cause/important assoc.)
S. aureus, B. cereus
Glomerulonephritis (adults) (MCM cause/important assoc.)
Berger disease (IgA nephropathy)
Gynecologic malignancy (MCM cause/important assoc.)
Endometrial carcinoma (most common in U.S.); cervical carcinoma (most common worldwide)
Heart murmur, congenital (MCM cause/important assoc.)
Mitral valve prolapse
Heart valve in bacterial endocarditis (MCM cause/important assoc.)
Mitral > aortic (rheumatic fever), tricuspid (IV drug abuse)
Helminth infection (U.S.) (MCM cause/important assoc.)
Enterobius vermicularis, Ascaris lumbricoides
Hematoma—epidural (MCM cause/important assoc.)
Rupture of middle meningeal artery (trauma; lentiform shaped)
Hematoma—subdural (MCM cause/important assoc.)
Rupture of bridging veins (crescent shaped)
Hemochromatosis (MCM cause/important assoc.)
Multiple blood transfusions or hereditary HFE mutation (can result in heart failure, “bronze diabetes,” and ? risk of hepatocellular carcinoma)
Hepatocellular carcinoma (MCM cause/important assoc.)
Cirrhotic liver (associated with hepatitis B and C and with alcoholism)
Hereditary bleeding disorder (MCM cause/important assoc.)
von Willebrand disease
Hereditary harmless jaundice (MCM cause/important assoc.)
Gilbert syndrome (benign congenital unconjugated hyperbilirubinemia)
HLA-B27 (MCM cause/important assoc.)
Ankylosing spondylitis, reactive arthritis, ulcerative colitis, psoriatic arthritis
HLA-DR3 (MCM cause/important assoc.)
Diabetes mellitus type 1, SLE, Graves disease, Hashimoto thyroiditis
HLA-DR4 (MCM cause/important assoc.)
Diabetes mellitus type 1, rheumatoid arthritis
Holosystolic murmur (MCM cause/important assoc.)
VSD, tricuspid regurgitation, mitral regurgitation
Hypercoagulability, endothelial damage, blood stasis (MCM cause/important assoc.)
Virchow triad ( risk of thrombosis)
Hypertension, 2° (MCM cause/important assoc.)
Renal disease
Hypoparathyroidism (MCM cause/important assoc.)
Accidental excision during thyroidectomy
Hypopituitarism (MCM cause/important assoc.)
Pituitary adenoma (usually benign tumor)
Infection 2° to blood transfusion (MCM cause/important assoc.)
Hepatitis C
Infections in chronic granulomatous disease (MCM cause/important assoc.)
S. aureus, E. coli, Aspergillus (catalase ?)
Intellectual disability (MCM cause/important assoc.)
Down syndrome, fragile X syndrome
Kidney stones (MCM cause/important assoc.)
Calcium = radiopaque; Struvite (ammonium) = radiopaque (formed by urease ? organisms such as Klebsiella, Proteus species, and S. saprophyticus); Uric acid = radiolucent
Late cyanotic shunt (uncorrected left to right becomes right to left) (MCM cause/important assoc.)
Eisenmenger syndrome (caused by ASD, VSD, PDA; results in pulmonary hypertension/polycythemia)
Liver disease (MCM cause/important assoc.)
Alcoholic cirrhosis
Lysosomal storage disease (MCM cause/important assoc.)
Gaucher disease
Male cancer (MCM cause/important assoc.)
Prostatic carcinoma
Malignancy associated with noninfectious fever (MCM cause/important assoc.)
Hodgkin lymphoma
Malignancy (kids) (MCM cause/important assoc.)
ALL, medulloblastoma (cerebellum)
Metastases to bone (MCM cause/important assoc.)
Prostate, breast > lung > thyroid
Metastases to brain (MCM cause/important assoc.)
Lung > breast > genitourinary > melanoma > GI
Metastases to liver (MCM cause/important assoc.)
Colon >> stomach, pancreas
Mitochondrial inheritance (MCM cause/important assoc.)
Disease occurs in both males and females, inherited through females only
Mitral valve stenosis (MCM cause/important assoc.)
Rheumatic heart disease
Mixed (UMN and LMN) motor neuron disease (MCM cause/important assoc.)
Amyotrophic lateral sclerosis
Myocarditis (MCM cause/important assoc.)
Coxsackie B
Nephrotic syndrome (adults) (MCM cause/important assoc.)
Focal segmental glomerulosclerosis
Nephrotic syndrome (kids) (MCM cause/important assoc.)
Minimal change disease
Neuron migration failure (MCM cause/important assoc.)
Kallmann syndrome (hypogonadotropic hypogonadism and anosmia)
Nosocomial pneumonia (MCM cause/important assoc.)
S. aureus, Pseudomonas, other enteric gram-negative rods
Obstruction of male urinary tract (MCM cause/important assoc.)
BPH
Opening snap (MCM cause/important assoc.)
Mitral stenosis
Opportunistic infection in AIDS (MCM cause/important assoc.)
Pneumocystis jirovecii pneumonia
Osteomyelitis (MCM cause/important assoc.)
S. aureus (most common overall)
Osteomyelitis in sickle cell disease (MCM cause/important assoc.)
Salmonella
Osteomyelitis with IV drug use (MCM cause/important assoc.)
Pseudomonas, Candida, S. aureus
Ovarian tumor (benign, bilateral) (MCM cause/important assoc.)
Serous cystadenoma
Ovarian tumor (malignant) (MCM cause/important assoc.)
Serous cystadenocarcinoma
Pancreatitis (acute) (MCM cause/important assoc.)
Gallstones, alcohol
Pancreatitis (chronic) (MCM cause/important assoc.)
Alcohol (adults), cystic fibrosis (kids)
Patient with ALL /CLL /AML /CML (MCM cause/important assoc.)
ALL: child, CLL: adult > 60, AML: adult ? 65, CML: adult 45-85
Pelvic inflammatory disease (MCM cause/important assoc.)
C. trachomatis, N. gonorrhoeae
Philadelphia chromosome t(9;22) (BCR-ABL) (MCM cause/important assoc.)
CML (may sometimes be associated with ALL/AML)
Pituitary tumor (MCM cause/important assoc.)
Prolactinoma, somatotropic adenoma
1° amenorrhea (MCM cause/important assoc.)
Turner syndrome (45,XO)
1° bone tumor (adults) (MCM cause/important assoc.)
Multiple myeloma
1° hyperaldosteronism (MCM cause/important assoc.)
Adenoma of adrenal cortex
1° hyperparathyroidism (MCM cause/important assoc.)
Adenomas, hyperplasia, carcinoma
1° liver cancer (MCM cause/important assoc.)
Hepatocellular carcinoma (chronic hepatitis, cirrhosis, hemochromatosis, ?1-antitrypsin deficiency, Wilson disease)
Pulmonary hypertension (MCM cause/important assoc.)
COPD
Recurrent inflammation/thrombosis of small/medium vessels in extremities (MCM cause/important assoc.)
Buerger disease (strongly associated with tobacco)
Renal tumor (MCM cause/important assoc.)
Renal cell carcinoma: associated with von Hippel-Lindau and cigarette smoking; paraneoplastic syndromes (EPO, renin, PTHrP, ACTH)
Right heart failure due to a pulmonary cause (MCM cause/important assoc.)
Cor pulmonale
S3 heart sound (MCM cause/important assoc.)
? ventricular filling pressure (e.g., mitral regurgitation, HF), common in dilated ventricles
S4 heart sound (MCM cause/important assoc.)
Stiff/hypertrophic ventricle (aortic stenosis, restrictive cardiomyopathy)
2° hyperparathyroidism (MCM cause/important assoc.)
Hypocalcemia of chronic kidney disease
Sexually transmitted disease (MCM cause/important assoc.)
C. trachomatis (usually coinfected with N. gonorrhoeae)
SIADH (MCM cause/important assoc.)
Small cell carcinoma of the lung
Site of diverticula (MCM cause/important assoc.)
Sigmoid colon
Sites of atherosclerosis (MCM cause/important assoc.)
Abdominal aorta > coronary artery > popliteal artery > carotid artery
Stomach cancer (MCM cause/important assoc.)
Adenocarcinoma
Stomach ulcerations and high gastrin levels (MCM cause/important assoc.)
Zollinger-Ellison syndrome (gastrinoma of duodenum or pancreas)
t(14;18) (MCM cause/important assoc.)
Follicular lymphomas (BCL-2 activation, anti-apoptotic oncogene)
t(8;14) (MCM cause/important assoc.)
Burkitt lymphoma (c-myc fusion, transcription factor oncogene)
t(9;22) (MCM cause/important assoc.)
Philadelphia chromosome, CML (BCR-ABL activation, tyrosine kinase oncogene)
Temporal arteritis (MCM cause/important assoc.)
Risk of ipsilateral blindness due to occlusion of ophthalmic artery; polymyalgia rheumatica
Testicular tumor (MCM cause/important assoc.)
Seminoma (malignant, radiosensitive)
Thyroid cancer (MCM cause/important assoc.)
Papillary carcinoma
Tumor in women (MCM cause/important assoc.)
Leiomyoma (estrogen dependent, not precancerous)
Tumor of infancy (MCM cause/important assoc.)
Strawberry hemangioma (usually regresses spontaneously by childhood)
Tumor of the adrenal medulla (adults) (MCM cause/important assoc.)
Pheochromocytoma (usually benign)
Tumor of the adrenal medulla (kids) (MCM cause/important assoc.)
Neuroblastoma (malignant)
Type of Hodgkin lymphoma (MCM cause/important assoc.)
Nodular sclerosing (vs. mixed cellularity, lymphocytic predominance, lymphocytic depletion)
Type of non-Hodgkin lymphoma (MCM cause/important assoc.)
Diffuse large B-cell lymphoma
UTI (MCM cause/important assoc.)
E. coli, Staphylococcus saprophyticus (young women)
Vertebral compression fracture (MCM cause/important assoc.)
Osteoporosis (type I: postmenopausal woman; type II: elderly man or woman)
Viral encephalitis affecting temporal lobe (MCM cause/important assoc.)
HSV-1
Vitamin deficiency (U.S.) (MCM cause/important assoc.)
Folate (pregnant women are at high risk; body stores only 3- to 4-month supply; prevents neural tube defects)
Sensitivity
Sensitivity = TP / (TP + FN)
Specificity
Specificity = TN / (TN + FP)
Positive predictive value
PPV = TP / (TP + FP)
Negative predictive value
NPV = TN / (FN + TN)
Odds ratio (for case-control studies)
OR = (a/c)/(b/d)= ad/bc
Relative risk
RR =[a/(a + b)]/[c/(c + d)]
Attributable risk
AR= a/(a+b)?c/(c+d)
Relative risk reduction
RRR = 1 ? RR
Absolute risk reduction
ARR=c/(c+d)-a/(a+b)
Number needed to treat
NNT = 1/absolute risk reduction
Number needed to harm
NNH = 1/attributable risk
Hardy-Weinberg equilibrium
p2 +2pq+q2 =1 p+q = 1
Volume of distribution
Vd = amount of drug in the body plasma drug concentration
Half-life
t1?2 = (0.693 × Vd)/CL
Drug clearance
CL = rate of elimination of drug = Vd × Ke (elimination constant) plasma drug concentration
Loading dose
LD = (Cp × Vd)/F
Maintenance dose
D = (Cp × CL × ?)/ F
Cardiac output equation
CO = rate of O2 consumption/(arterial O2 content ? venous O2 content); CO = stroke volume × heart rate
Mean arterial pressure equation
MAP = cardiac output × total peripheral resistance MAP = 2 ?3 diastolic + 1 ?3 systolic
Stroke volume equation
SV = EDV - ESV
Ejection fraction equation
EF= SV/EDV =(EDV?ESV)/EDV
Resistance equation
Resistance = driving pressure (?P) = 8? (viscosity) × length flow (Q) ?r4
Capillary fluid exchange equation
Jv = net fluid flow = Kf[(Pc ? Pi) ? ?(?c ? ?i)]
Renal clearance equation
Cx = UxV/Px
Glomerular filtration rate equation
GFR = Uinulin × V/Pinulin = Cinulin; GFR = Kf [(PGC - PBS) - (?GC - ?BS)]
Effective renal plasma flow equation
eRPF = U(PAH) × V/P(PAH) = C(PAH)
Renal blood flow equation
RBF = RPF/(1?Hct)
Filtration fraction equation
FF = GFR/RPF
Henderson-Hasselbalch equation (for extracellular pH)
pH = 6.1 + log [HCO3?]/(0.03 Pco2 )
Winters formula equation
Pco2 =1.5[HCO3-]+8±2
Physiologic dead space equation
VD = VT × (PaCO2 ? PECO2)/PaCO2
Pulmonary vascular resistance equation
PVR = (P[pulm artery] - P[L atrium])/ cardiac output
Alveolar gas equation
PAo2 = PIo2 - Paco2/R