Classic Labs/Findings Flashcards
Anticentromere antibodies
Scleroderma (CREST)
Antidesmoglein (epithelial) antibodies
Pemphigus vulgaris (blistering)
Anti-blomerular basement membrane antibodies
Goodpasture’s syndrome (glomerulonephritis and lung hemorrhage)
Antihistone antibodies
Drug-induced SLE
Anti-IgG antibodies
Rheumatoid arthritis (systemic inflammation, joint pannus, boutonniere deformity)
Antimitochondrial antibodies (AMAs)
Primary biliary cirrhosis (female, cholestasis, portal hypertension)
Antineutrophil cytoplasmic antibodies
Vasculitis (Wegener’s, microscopic polyangiitis, glomerulonephritis)
Antinuclear antibodies (ANAs: anti-Smith and anti-dsDNA)
SLE (type III hypersensitivity)
Antiplatelet antibodies
Idiopathic thrombocytopenic purpura (ITP) (bleeding diathesis)
Anti-topoisomerase antibodies
Diffuse systemic scleroderma
Anti-transflutaminase/antigliadin antibodies
Celiac disease (diarrhea, distention, weight loss)
Azurophilic granular needles in leukemic blasts
Auer rods (acute myelogenous leukemia, especially the promyelocytic type) (peroxidase positive)
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 tap on LP
Subarachnoid hemorrhage
Boot-shaped heart on x-ray
Tetralogy of Fallot; RVH
Branching gram-positive rods with sulfur granules
Actinomyces israelii
Bronchogenic apical lung tumor
Pancoast’s tumor (can compress sympathetic ganglion and cause Horner’s syndrome)
brown tumor of bone
Hemorrhage (hemosiderin) causes brown color of osteolytic cysts, due to
- hyperparathyroidism
- osteitis fibrosa cystica (von Recklinghausen’s disease of bone)
Cardiomegaly with apical atrophy
Chagas’ disease (Trypanosoma cruzi)
Cellular crescents in Bowman’s 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, Ewing’s Sarcoma)
Colonies of mucoid Pseudomonas in lungs
Cystic fibrosis (CFTR mutation in caucasians resulting in fat-soluble vitamin deficiency and mucous plugs)
Degeneeration of dorsal column nerves
Tabes dorsalis (tertiary syphilis)
Depigmentation of neurons in substantia nigra
Parkinson’s disease (basal ganglia disorder; rigidity, resting tremor, bradykinesia)
Desquamated epihthelium casts in sputum
Curschmann’s spirals (bronchial asthma, can result in whorled mucous plugs)
Disarrayed granulosa cells in eosinophilic fluid
Call-Exner bodies (granulosa-theca cell tumor of the ovary)
Dysplastic squamous cervical cells with nuclear enlargement and hyperchromasia
Koilocytes (HPV 16 and 18; predisposes to cervical cancer)
Enlarged cells with intranuclear inclusion bodies
Owl’s eye appearance of CMV
Enlarged thyroid cells with ground-glass nuclei
OOrphan Annie eye nuclei (papillary carcinoma of the thyroid)
Eosinophilic cytoplasmic inclusion in liver cell
Mallory bodies (alcoholic liver disease)
Eosinophilic cytoplasmic inclusion in nerve cell
Lewy body (Parkinson’s disease)
Eosinophilic globule in liver
Councilman body (viral hepatitis, often yyellow fever)
Eosinophilic inclusion bodies in cytoplasm of hippocampal nerve cells
Rabies virus (Lyssavirus) (these are negri bodies)
Extracellular amyloid deposition in gray matter of brain
Senile plaques (Alzheimer’s)
Giant B cells with bilobed nuclei with prominent inclusions (owl’s eye)
Reed-Sternberg cells (Hodgkin’s lymphoma)
Glomerulus-like structure surrounding vessel in germ cells
Schiller-Duval bodies (yolk sac tumor)
Hair-on-end (crew-cut) appearance on x-ray
beta-thalassemia, sickle cell anemia (extramedullary hematopoiesis)
hCG elevated (2)
Choriocarcinoma, hydatidiform mole (occurs with and without embryo)
Heart nodules (inflammatory)
Aschoff bodies (rheumatic fever) (focal myocardial infarction with multinucleate giant cells)
Heterophile antibodies
Infectious mononucleosis (EBV) (IgM antibodies made by infected B cells, happen to bind sheep’s blood)
hexagonal, double-pointed, needle-like crystals in bronchial secretions
Bronchial asthma (Charcot-Leyden crystals: eosinophilic granules)
High levels of D-dimers
DVT, pulmonary embolism, DIC
Honeycomb lung on x-ray
interstitial fibrosis
Hypersegmented neutrophils
Megaloblastic anemia (B12, folate deficiency)
Hypochromic, microcytic anemia (3)
Iron deficiency anemia
Lead poisoning
Thalassemia (HbF sometimes present)
Increased alpha-fetoprotein in amniotic fluid/maternal serum (2)
Anencephaly spina bifida (neural tube defects)
Increased uric acid levels (4)
Gout
Lesch-Nyhan syndrome
Myeloproliferative disorders
loop and thiazide diuretics
Intranuclear eosinophilic droplet-like bodies
Cowdry type A bodies (HSV or yellow fever)
Iron-containing nodules in alveolar septum
Ferruginous bodies (asbestosis: increased chance of mesothelioma)
Large lysosomal vesicles in phagocytes, immunocompromised
Chediak-Higashi disease (failure of phagolysosome formation)
Low serum ceruloplasmin
Wilson’s disease (hepatolenticular degeneration)
Lumpy-bumpy appearance of glomeruli on immunofluorescence
Poststreptococcal glomerulonephritis
Lytic (“hole-punched”) bone lesions on x-ray
Multiple myeloma
Mammary gland (blue-domed) cyst
Fibrocystic change of the breast
Monoclonal antibody spike (3)
Multiple myeloma (called the M protein; usually IgG or IgA) Monoclonal gammopathy of undetermined significance (MGUS) Waldenstrom's macroglobulinemia (M protein= IgM)
Monoclonal globulin protein in blood/urine (2)
Bence Jones proteins (multiple myeloma (kappa or lambda Ig light chains in urine)
Waldenstrom’s macroglobulinemia (IgM)
Mucin-filled cell with peripheral nucleus
Signet ring (gastric carcinoma)
Narrowing of bowell lumen on barium radiograph
String sign of Crohn’s disease
Needle-shaped, negatively birefringent crystals
Gout (hyperuricemia)
Nodular hyaline deposits in glomeruli
Kimmelstiel-Wilson nodules (diabetic nephropathy)
Nutmeg appearance of liver
Chronic passive congestion of liver due to right heart failure
Onion-skin periosteal reaction
Ewing’s sarcoma (malignant round-cell tumor)
Periosteum raised from bone, creating triangular area
Codman’s triangle on x-ray (osteosarcoma, pyogenic osteomyelitis)
Podocyte fusion on EM
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 protein tau
Neurofibrillary tangles (Alzheimer’s disease and CJD)
Pseudopalisade tumor cell arrangement
Glioblastoma multiforme
RBC casts in urine
Acute glomerulonephritis
Rectangular, crystal-like inclusions in Leydig cells
Reinke crystals (Leydig cell tumor)
Renal epithelial casts in urine
Acute toxic/viral nephrosis
Rhomboid crystals, positively birefringent
Pseudogoud (calcium pyrophosphate dihydrate)
Rib notching
Coarctation of the arots
Sheets of medium-sized lymphoid cells (starry sky appearance on histology)
Burkitt’s lymphoma (t 8:14 c-myc activation, associated with EBV)
Silver-staining spherical aggregation of tau proteins in neurons
Pick bodies (Pick’s disease; progressive dementia, similar to Alzheimer’s)
Small granulomatous lesion in lungs (can calcify)
Ghon focus (primary TB)
Small, round RBC inclusions
Heinz bodies (G6PD deficiency, alpha-thalassemia, chronic liver disease)
Soap bubble on x-ray
Giant cell tumor of bone (generally benign)
Spikes on basement membrane, dome-like endothelial deposits
Membranous glomerulonephritis, may progress to nephrotic syndrome
Stacks of red blood cells
Rouleaux formation (high ESR: multiple myeloma)
Stippled vaginal epithelial cells
Clue cells (Gardnerella vaginalis)
Tennis-racket shaped cytoplasmic organelles (EM) in Langerhans cells
Birbeck granules (histiocytosis X: eosinophilic granuloma)
Thrombi made of white/red layers
Lines of Zahn (arterial thrombus, layers of platelets/RBCs)
Thumb sign on lateral x-ray
Epiglottitis (h. influenzae)
Thyroid-like appearance of kidney
Chronic bacterial pyelonephritis
Tram-track appearance on LM
Membranoproliferative glomerulonephritis
Triglyceride accumulation in liver cell vacuoles
Fatty liver disease (alcoholic or metabolic syndrome)
WBCs that look “smudged”
CLL (almost always B cell; affects the elderly)
Wire loop glomerular appearance on LM
Lupus nephropathy
Yellow CSF
xanthochromia (subarachnoid hemorrhage)