Wrong Answers Flashcards
This medication used for TB can have a side effect of peripheral neuropathy.
Isoniazid
Peripheral neuropathy can be prevented if isoniazid is given together with what?
B6 (pyridoxine)
This is a fusion inhibitor used in treatment of HIV. It binds to CCR5 on surface of T cells to inhibit interaction with gp120 (thus preventing viral binding).
Maraviroc
This medication is used to prevent vaso-occlusive pain episodes in patients with sickle cell disease.
Hydroxyurea
Hydroxyurea acts by increasing the production of _______ _______, which reduces polymerization of sickle hemoglobin and sickling of RBCs.
Fetal Hemoglobin
This is a major side effect of hydroxyurea that must be monitored for.
Myelosuppression
This drug used for TB inhibits arabinosyl transferase III, which disrupts assembly of mycobacterial cell walls.
Ethambutol
What is the major side effect of ethambutol, and how does it present?
Optic neuritis – presents as blurred vision and red-green color blindness
What type of drug class should NOT be used in pts with a hx of reactive airway disease or other respiratory disorders?
Nonselective beta-adrenergic receptor blockers (ie, propranolol)
What are the intestinal nematodes?
Enterobius vermicularis (pinworm) Ascaris lumbricoides (giant roundworm) Strongyloides stercoralis (threadworm) Necator americanus (hookworms) Trichuris trichiura (whipworm)
What are the treatments for the intestinal nematodes?
Enterobus vermicularis (pinworm) = pyrantel pamoate or bendazoles
Ascaris lumbricoides (giant roundworm) = bendazoles
Strongyloides stercoralis (threadworm) = ivermectin or bendazoles
Necator americanus (hookworms) = bendazoles
Trichuris trichiura (whipworm) = bendazoles
What are the tissue nematodes?
Toxocara canis
Onchocerca volvulus
Loa Loa
Wuchereria bancrofti
What are the treatments for tissue nematodes?
Toxocara canis = bendazoles
Onchocerca volvulus = ivermectin
Loa Loa = diethylcarbamazine
Wuchereria bancrofti = diethylcarbamazine
What are the cestodes?
Taenia solium
Diphyllobothrium latum
Echinococcus granulosus
What are the treatments for the cestodes?
Taenia solium = praziquantel and albendazole (neurocysticercosis)
Diphyllobothrium latum = praziquantel
Echinococcus granulosus = albendazole
What are the trematodes?
Schistosoma
Clonorchis sinensis
What are the treatments for the trematodes?
Schistosoma = praziquantel
Clonorchis sinensis = praziquantel
This medication is a 5-alpha reductase inhibitor that decreases dihydrotestosterone levels by decreasing its conversion from testosterone. Helps with BPH.
Finasteride
Why should females of child-bearing age NOT handle finasteride?
Can cause feminization of the male fetus
What are infants born to mothers with DM at increased risk for within the first few hours after birth?
Hypoglycemia – due to in utero hyperglycemia and overproduction of insulin in the infant immediately after delivery
This is the most common thyroid malignancy and is strongly linked to hx of radiation exposures (especially in childhood).
Papillary carcinoma
What can be seen on histology of papillary carcinoma?
Psammoma bodies
Ground-glass nuclei
This disease presents with chronic crusting, eczema-like reaction, and ulcers around the nipple.
Paget disease
Paget disease of the breast are often associated with what malignancy?
Invasive ductal carcinoma
This is an ovarian tumor consisting of ectopic thyroid tissue (causes elevation of thyroid hormones in some patients).
Struma ovarii
These are a type of cyst caused by luteinization and hypertrophy of the theca interna cells.
Theca lutein cysts
Theca lutein cysts form as a result of overstimulation of what?
Beta-hCG
MEN syndromes type 2A and 2B are caused by mutations in what?
RET
MEN syndromes type 2A and 2B are associated with what diseases?
Pheochromocytoma
Medullary thyroid cancer
These tumors are ovarian metastases from GI tract primary cancers. They are poorly cohesive adenocarcinomas with signet ring cells.
Krukenberg tumors
This is secreted by squamous cell malignancies and increases calcium levels, resulting in suppression of endogenous PTH level secretion.
PTHrP (parathyroid hormone-related peptide)
This is one of the most common cardiac tumors in children and infants, composed of hamartomatous cardiac tissue.
Cardiac rhabdomyoma
What cardiac tumor is strongly associated with tuberous sclerosis (mainly in children)?
Cardiac rhabdomyoma
ECG reading showing steadily increasing PR intervals until a beat is dropped, then resets.
Mobitz Type I
What are the main characteristics of ToF?
Pulmonic valve stenosis
Right ventricular hypertrophy
Overriding aorta
VSD
What does ToF look like on CT?
Boot-shaped heart
What coronary artery and ECG leads are involved in the septal heart area?
LAD
V1-V2
What coronary artery and ECG leads are involved in the anterior heart area?
LAD
V3-V4
What coronary artery and ECG leads are involved in the lateral heart area?
Left circumflex
I, aVL, V5, V6
What coronary artery and ECG leads are involved in the inferior heart area?
Right coronary
II, III, aVF
What coronary artery and ECG leads are involved in the posterior heart area?
Posterior descending
V1-V3, posterior leads V7-V9
This disease is characterized by ineffective erythropoiesis – patients present within their first year of life with a nonmegaloblastic, macrocytic anemia and structural defects.
Diamond-Blackfan anemia
What lab studies will be seen with Diamond-Blackfan anemia?
Decreased reticulocytes
Increased fetal hemoglobin
This disease has a classic presentation of an erythematous malar rash with circumoral pallor and a reticular rash that begins on the arms and spreads to trunk.
Erythema infectiosum (Fifth Disease)
***Rash is called “slapped cheek” rash
What causes erythema infectiosum?
Parvovirus B19
What can occur happen to a fetus upon infection of a seronegative pregnant female with erythema infectiosum?
May cause severe fetal anemia and hydrops fetalis
Gestational DM is caused by a production of what?
Human placental lactogen (HPL)
When is screening for gestational DM?
24-28 wks gestation via oral glucose tolerance test
This disease is a common, usually self-limited disease primarily of children. It is systemic IgA vasculitis that presents with a purpuric rash, arthritis, GI pain and perhaps bleeding.
Henoch-Schonlein purpura
What causes hematuria in Henoch-Schonlein purpura?
Mesangial IgA deposition in glomeruli
In embryonic development of the kidney, what forms from the metanephric mesenchyme?
Glomeruli
PCTs
Loop of Henle
DCTs
In embryonic development of the kidney, what forms from the ureteric bud structures?
Collecting tubules Minor calyces Major calyces Renal pelvis Ureters
This disease is caused by the absence of the stratum basalis layer of endometrial lining, resulting in endometrial lining that is inadequate for zygote implantation.
Asherman syndrome
What are common symptoms of Asherman syndrome?
Recurrent spontaneous abortion
Secondary amenorrhea
This is a disorder that causes psychological distress and impairment in function due to one or more somatic symptoms not explained by another medical condition.
Somatic symptom disorder
In what stage does sleepwalking occur? What waves are predominate?
NREM stage 3 – Delta waves
List the sleep stages and their corresponding EEG waveforms.
Awake (eyes open) = Beta Awake (eyes close) = Alpha NREM stage N1 = Theta NREM stage N2 = Sleep spindles and K-complexes NREM stage N3 = Delta REM = Beta
This is a disorder of sleep-wake cycle involving a significant decrease in REM latency.
Narcolepsy
This disorder involves at least 4 days of elevated mood and increased energy. It also includes –>
- Pressure speech
- Increased psychomotor activity
- Decreased need for sleep
Hypomanic episode
How does a hypomanic episode differ from a manic episode?
Hypomanic episodes do NOT cause marked functional impairment, result in hospitalization, or involve psychosis
Manic is also 7 or more days
What is the equation for incidence in a treatment group?
A/(A+B)
What is the equation for incidence in a placebo group?
C/(C+D)
What is the equation for relative risk (RR)?
[A/(A+B)] / [C/(C+D)]
What is the equation for attributable risk (AR)?
[A/(A+B)] - [C/(C+D)]
What is the equation for odds ratio?
AD/BC
What is the equation for sensitivity?
TP/(TP + FN)
or
A/(A+C)
What is the equation for specificity?
TN/(TN + FP)
or
D/(D+B)
What is the equation for positive predictive value (PPV)?
TP/(TP + FP)
or
A/(A+B)
What is the equation for negative predictive value (NPV)?
TN/(FN + TN)
or
D/(C+D)
A patient presents with distal lymphangitis and occupation puts him or her at risk for skin injury from thorns. What is the microorganism?
Sporotrichosis
This is a childhood infection usually caused by human herpesvirus 6.
Roseola
What is the clinical presentation of roseola?
- 3 to 5 days high fever with abrupt defervescence
- Macular or maculopapular rash on neck and trunk that spreads to extremities
This microorganism will present in sexually active females as frothy, foul-smelling, greenish-yellow discharge.
Trichomonas vaginalis
Trichomonas vaginalis is a (IMMOTILE/MOTILE) protozoan.
Motile
This is microorganism is a gram-positive, weakly acid-fast bacilli with a filamentous appearance in tissues and culture. It can cause pulmonary infections in immunocompromised pts.
Nocardia
What is the best treatment for Nocardia?
TMP-SMX
This presents as painful, vesicular genital lesions accompanied by painful lymphadenopathy.
HSV-2 (genital herpes)
How can HSV-2 be diagnosed? What will it show?
Tzanck smear – shows multinucleated giant cells
This microorganism presents with nocturnal perianal itching and is usually seen in school-aged children.
Enterobius vermicularis (pinworm)
This microorganism is a nonenveloped, single-stranded RNA enterovirus that causes hand-foot-and-mouth disease.
Coxsackie Virus A
This is caused by a constellation of symptoms caused by a neuroendocrine tumor that secretes vasoactive substances (ie, serotonin).
Carcinoid Syndrome
What is the clinical presentation of carcinoid syndrome?
- Episodic upper body flushing
- Telangiectasias
- Diarrhea
- Bronchospasm
What is the treatment for carcinoid syndrome?
Octreotide or Lanreotide
What Abs are seen with SLE?
ANA
Anti-dsDNA
Anti-Smith
What Abs are seen with drug-induced lupus?
Anti-histone
What Abs are seen with polymyositis?
Anti-Jo-1
What Abs are seen with limited systemic sclerosis (CREST)?
Anti-centromere
What Abs are seen with diffuse systemic sclerosis?
Scl-70 (anti-DNA topoisomerase I)
What Abs are seen with RA?
- Rheumatoid factor
- Anti-cyclic citrullinated peptide
What Abs are seen with mixed CT disease?
Anti-U1 ribonucleoprotein
What Abs are seen with Sjogren’s disease?
- SSB/La
- SSA/Ro
This disease presents with polyuria, polydipsia, and an inability to concentrate urine due to a lack of ADH secretion from the posterior pituitary.
Central diabetes insipidus
A supracondylar fracture of the humerus can result in injury to what nerve?
Median N.
This is a genetic disorder of the type IV collagen, resulting in basement membrane defects.
Alport Syndrome
What issues are caused due to the basement membrane defects in Alport syndrome?
- Hematuria
- Sensorineural hearing loss
- Vision loss from lens defects
***Hereditary nephritis can present in childhood
This is the term that refers to subjects modifying their behaviors based on knowing that they are being studied.
Hawthorne effect
Pemphigus vulgaris is an autoimmune disease caused by what?
IgG Abs against desmosomes (desmoglein 1 and desmoglein 3) located on surface of keratinocytes
Pemphigus vulgaris is (SUBEPIDERMAL/INTRAEPIDERMAL).
Intraepidermal
What disease presents with flaccid bullae, erosions on the skin and oral mucosa, and a positive Nikolsky sign (skin tears on bullae when slightly touched)?
Pemphigus vulgaris
Bullous pemphigoid is an autoimmune disease caused by what?
IgG Abs against hemidesmosomes (BP180 and BP230)
Bullous pemphigoid is (SUBEPIDERMAL/INTRAEPIDERMAL).
Subepidermal
What disease presents with tense bullae and a negative Nikolsky sign?
Bullous pemphigoid
What can a positive Homan sign indicate could be present?
DVT
***Dorsiflex foot, causes pain in calf
Homan test is unreliable for accurate diagnosis of DVT, so what is the first line imaging modality for accurate diagnosis of DVT?
Compression ultrasonography
This microorganism is a lactose-negative and oxidase-negative rod that produces H2S (hydrogen sulfide).
Salmonella typhimurium
How does Salmonella cause watery to bloody diarrhea?
Via direct adherence and invasion into both enterocytes and macrophages (utilizing a type III secretion system)
This is a polymorphic ventricular tachycardia and often occurs as a complication of treatment with QT-prolonging medications (including antipsychotics such as haloperidol).
Torsades de pointes
What is used to treat a hemodynamically stable patient with torsades de pointes?
IV magnesium
What is the pharmacology for Afib and Atrial flutter?
- Adenosine
- Amiodarone
- Beta blockers
- Calcium channel blockers (ie, diltiazem, verapamil)
- Digoxin
What is the pharmacology for Digoxin toxicity?
- Anti-digoxin Fab fragments
- Magnesium sulfate
What is the pharmacology for monomorphic ventricular tachycardia?
- Amiodarone
- Lidocaine
What is the pharmacology for paroxysmal supraventricular tachycardia?
Adenosine
What is the pharmacology for sinus brady?
Atropine
What is the pharmacology for TCA toxicity?
Sodium bicarbonate
Rabies virus can cause fatal encephalitis, resulting in what characteristic finding upon autopsy?
Negri bodies (neuronal eosinophilic cytoplasmic inclusions)
This is the most common organism that causes impetigo.
Staph aureus
Staph aureus most commonly causes a nonbullous form of impetigo, however there is a bullous form and it is due to what toxin?
Exfoliative toxin A
The MOA of exfoliative toxin A in bullous impetigo is similar to the pathophysiology of pemphigus vulgaris, which is what?
Auto-Abs are directed against desmoglein A
What is the ANCA staining pattern for GPA (granulomatosis with polyangiitis) and its most common ANCA Ag?
C-ANCA
PR3
This disease is characterized by frequent ENT, pulmonary, and renal symptoms and has a C-ANCA staining pattern.
GPA (granulomatosis with polyangiitis)
What is the ANCA staining pattern and Ag for microscopic polyangiitis?
P-ANCA
MPO
What is the ANCA staining pattern and Ag for Eosinophilic granulomatosis with polyangiitis (Churg-Strauss)?
P-ANCA
MPO
What is the ANCA staining pattern and Ag for Antiglomerular basement membrane-autoAb disease?
P-ANCA
MPO
What is the ANCA staining pattern and Ag for drug-induced ANCA-associated vasculitis?
P-ANCA
MPO
What is the ANCA staining pattern and Ag for ulcerative colitis?
P-ANCA
Myeloid-specific nuclear envelope protein
What is the ANCA staining pattern and Ag for Primary sclerosis cholangitis?
P-ANCA
Myeloid-specific nuclear envelope protein
Sickle cell disease is an autosomal (DOMINANT/RECESSIVE) disorder caused by a mutation of (ADULT/FETAL) hemoglobin.
Recessive
Adult
What substitution occurs in Sickle Cell disease?
Valine replaces glutamic acid on the beta chain of adult Hgb
This is a self-limiting thyrotoxicosis caused by a release of pre-formed thyroid hormone from an inflamed thyroid gland. It classically follows a flu-like illness. Distinguishable from other hyperthyroid etiologies b/c it is the ONLY type with a painful, enlarged thyroid gland.
Subacute granulomatous thyroiditis (de Quervain thyroiditis)
This is a protozoan parasite that causes malodorous watery diarrhea.
Giardia lamblia
What is the 1st-line treatment for Giardia lamblia?
Metronidazole
Tinidazole
Nitazoxanide
What is the MOA of Metronidazole?
Creates free radical metabolites that damage DNA
Where is Histoplasmosis endemic to?
- Mississippi River Vally
- Ohio River Valley
Where is Blastomycosis endemic to?
- Southeastern and South-Central US (bordering Miss. and Ohio River basins)
- Midwestern US and Canadian provinces bordering Great Lakes
- New York and Canada along the St. Lawrence River and the Nelson River
Where is Coccidiomycosis endemic to?
- Southwestern US
- California
Where is Paracoccidioidmycosis endemic to?
- Certain regions of Mexico
- Central and South America
Infection with Histoplasma capsulatum is the most common cause of _______ _______, ahead of TB and radiation therapy.
Chronic mediastinitis
The most common cause of respiratory distress in premature infants is neonatal RDS, which is caused by surfactant deficiency. A major component of surfactant is _________, the level of which would be decreased in the lungs of a neonate with RDS.
dipalmitoylphosphatidylcholine
What is the most common cause of sudden death within 24 hours after onset of MI symptoms?
Arrhythmia (primarily ventricular tachycardia or Vfib)
What is the most common cause of ASD?
Failure of the ostium secundum to close during formation of the atrial septum
What is the heart sound for an ASD?
Fixed splitting of the S2 heart sound (pulmonary valve closes after the aortic valve because of increased right ventricular blood volume)
When an ASD is large, right-to-left shunting may eventually develop, which is called what?
Eisenmenger syndrome
Sickle cell disease patients are at risk of having an _______ _______, often associated with parvovirus B19 infection, during which time erythropoiesis is suppressed.
Aplastic crisis
Ventilation, perfusion, and compliance differ in the lung because of gravitational forces. When standing, ventilation, perfusion, and compliance are (MORE/LESS) at the apex than at the base of the lungs.
Less
Cystine kidney stones are the rarest, and appear with what shape on microscopy?
Hexagon
What testing would be positive for cystine kidney stones?
Cyanide-nitroprusside testing
This type of dyslipidemia results in elevated serum triglycerides and affected patients are at risk of developing acute pancreatitis.
Hyperchylomicronemia (type I familial dyslipidemia)
In Hyperchylomicronemia, what would centrifugation of a blood sample look like?
There would be a creamy layer in the supernatant
This presents as a papulovesicular, pruritic skin rash on the elbows and knees and is associated with Celiac disease.
Dermatitis herpetiformis
What is the pathophysiology of dermatitis herpetiformis?
Development of IgA Abs that react against gliadin and cause micro abscess formation at the dermal papillae tips
Obstructive sleep apnea causes hypoxia, which can trigger pulmonary vasoconstriction and lead to what?
Pulmonary HTN
What is the best auscultatory location for the aortic valve?
Right upper sternal
Second intercostal
What is the best auscultatory location for the pulmonic valve?
Left upper sternal
Second intercostal
What is the best auscultatory location for the tricuspid valve?
Left lower sternal
Fourth intercostal
What is the best auscultatory location for the mitral valve?
Left mid-clavicular
Fifth intercostal
This murmur sound is a high-pitched blowing, early diastole decrescendo.
Aortic regurgitation
This murmur sound is a crescendo-decrescendo systolic ejection.
Aortic stenosis
This murmur sound is a mid-systolic high-pitched crescendo-decrescendo.
Pulmonary stenosis
This murmur sound is holosystolic and high-pitched.
Tricuspid valve regurgitation
This murmur sound has an opening snap with delayed rumble during late diastole.
Mitral stenosis
This murmur sound is a late systolic crescendo with mid-systolic click.
Mitral valve prolapse
This murmur sound is holosystolic, high-pitched, and radiates to the axilla.
Mitral valve regurgitation
What are the diastolic murmurs?
Aortic regurgitation
Pulmonic regurgitation
Mitral stenosis
Tricuspid stenosis
What are the systolic murmurs?
Aortic stenosis Pulmonic stenosis Mitral regurgitation Tricuspid regurgitation Mitral valve prolapse
What do the PFTs look like in obstructive lung diseases (ie, COPD)?
Decreased FEV1
Decreased FVC
Decreased FEV1/FVC ratio
Increased TLC
What are the recommended drugs for HTN in pregnancy?
Hydralazine
Labetalol
Nifedipine
Methyldopa
What is the DOC for panic disorder and/or agoraphobia?
Paroxetine (type of SSRI)
During menopause, a loss of sensitivity to gonadotropins results in an increase of what?
FSH
LH
What levels are measured clinically to determine if a woman has reached menopause?
Elevated FSH
This is a parasite that causes the highly pathogenic Primary Amebic Meningoencephalitis (PAM) and is transmitted through contaminated water that contacts the nasal mucosa.
Naegleria fowleri
***Called the “Brain-eating amoeba”