FA RR labs findings Flashcards
Anticentromere antibodies
Scleroderma (CREST)
Antidesmoglein (epithelial) antibodies
Pemphigus vulgaris (blistering)
Anti-glomerul ar basement membrane antibodies
Goodpasture’s syndrome (glomerulonephritis and hemoptysis)
Antihistone antibodies
Drug-induced SLE (hydralazine, isoniazid, phenytoin, procainamide)
Anti-IgG antibodies (IgM)
Rheumatoid arthritis (systemic inflammation, joint pannus, boutonniere deformity)
Antimitochondrial antibodies (AMAs)
1 ° biliary cirrhosis (female, cholestasis, portal hypertension)
Anti neutroph il cytoplasmic antibodies (ANCAs)
Vasculitis (c-ANCA: granulomatos is with polyangiitis [Wegener’s]; p-ANCA: microscopic polyangiitis, Churg Strauss syndrome)
Antinuclear antibodies (ANAs : anti-Sm ith 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, distention, weight loss)
Apple core l esion on abdominal x- ray
Colorectal cancer (usually left-sided)
Azurophilic peroxidase-positive granular inclusions in granulocytes and myeloblasts
Auer rods (acute myelogenous leukemia, especially the promyelocytic [M3] type)
Bacitracin response
Sensitive: Streptococcus pyogenes (group A) ; resistant: Streptococcus agalactiae (group B)
Bamboo spine on x-ray
Ankylosing spondylitis (chronic inflammatory arthritis: HLA-B27)
Basophilic nuclear remnants in RBCs
Howell-Jolly bodies (clue 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 on imaging
Pancoast tumor (can compress sympathetic ganglion and cause Horner’s 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’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, retinoblastoma)
Colonies of mucoid Pseudomonas in lungs
Cystic fibrosis (autosomal-recessive mutation in CFTR resulting in fat-soluble vitamin deficiency and mucous plugs)
Decreased α-fetoprotein in amniotic fluid/maternal serum
Down syndrome or other chromosomal abnormality
Degeneration of dorsal column nerves
Tabes dorsalis (3° syphil is), subacute combined degeneration (dorsal columns and late ral corticospinal tracts affected)
Depigmentation of neurons in substantia nigra
Parkinson’s disease (basal ganglia disorder: rigidity, resting tremor, bradykinesia)
Desquamated epithelium casts in sputum
Curschmann’s spirals (bronch ial 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 cel ls with nuclear enlargement and hyperchromasia
Koilocytes (HPV: predisposes to cervical cancer)
Enlarged cells with intranuclear inclusion bodies
Owl’s eye appearance of CMV
Enlarged thyroid cells with ground-glass nuclei
“Orphan Annie’s eyes” nuclei (papillary carcinoma of the thyroid)
Eosinophilic cytoplasmic inclusion in liver cell
Mallory bodies (alcoholic liver disease)
Eosinophilic cytoplasmic inclusion in nerve cel l
Lewy body (Parkinson’s disease)
Eosinophilic globule in liver
Councilman body (toxic or viral hepatitis, often yellow fever)
Eosinophilic inclusion bodies in cytoplasm of hippocampal nerve cells
Negri bodies of rabies (Lyssavirus)
Extracellular amyloid deposition in gray matter of brain
Senile plaques (Alzheimer’s disease)
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
ß-thalassemia, sickle cell anem ia (marrow expansion)
hCG elevated
Choriocarcinoma, hydatidiform mole (occurs with and without embryo)
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, pulmonary embolism, DIC
Hilar lymphadenopathy, peripheral granulomatous lesion in middle or lower lung lobes (can calcify)
Ghon complex 1st TB : Mycobacterium bacilli)
Honeycomb lung on x-ray or CT
Interstitial pulmonary fibrosis
Hypercoagulability (leading to migrating DVTs and vasculitis)
Trousseau’s syndrome (adenocarcinoma of pancreas or lung)
Hypersegmented neutrophils
Megaloblastic anemia (B12 deficiency: neurologic symptoms; folate deficiency: no neurologic symptoms)
Hypertension, hypokalemia, metabolic alkalosis
Conn’s syndrome
Hypochromic, microcytic anemia
Iron deficiency anemia, lead poisoning, thalassemia (fetal hemoglobin sometimes present)
Increased α-fetoprotein 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 CMV)
Iron-containing nodules in alveolar septum
Ferruginous bodies (asbestosis: t chance of mesothel ioma)
Keratin pea rls on a skin biopsy
Squamous cell carcinoma
Large lysosomal vesicles in phagocytes, immunodeficiency
Chediak-Higashi disease (congenital failure of phagolysosome formation)
Lead pipe appearance of colon on barium enema x-ray
Ulcerative colitis (loss of haustra)
Linear appearance of lgG deposition on glomerular basement membrane
Goodpasture’s syndrome
Low serum ceruloplasmin
Wilson’s disease (hepatolenticular degeneration)
Lumpy bumpy appearance of glomeruli on immunofluorescence
Poststrcptococcal glomerulonephritis (immune complex deposition of lgG and C3b)
Lytic (“hole punched”) bone lesions on x-ray
Multiple myeloma
Mammary gland (“blue domed”) cyst
Fibrocystic change of the breast
Monoclonal antibody spike
• Multiple myeloma (usually lgG or lgA) • Monoclonal gam mopathy of undetermined significance (MGUS; normal consequence of aging) • Waldenstrom’s (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’s disease)
Necrotizing vasculitis (lungs) and necrotizing glomerulonephritis
Granulomato sis with polyangiitis (Wegener’s ; c-ANCA positive) and Goodpasture’s syndro me (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: Staphylococcus epidermidis; resistant: Staphylococcus saprophyticus
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)
Optochin response
Sensitive: Streptococcus pneumoniae; resistant: Viridans streptococcus
Periosteum raised from bone, creating triangular area
Codman’s triangle on x-ray (osteosarcoma, Ewing’s 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 protein tau
Neurofibrillary tangles (Alzheimer’s disease) and Pick’s bodies (Pick’s 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
Acute glomerulonephritis
Rectangular, crystal-l ike, cytoplasmic inclusions in Leydig cells
Reinke crystals ( Leydig cell tumor)
Renal epithelial casts in urine
Acute toxic/viral nephrosis
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’s lymphoma (t[8:14] c-myc activation, associated with EBV; “black sky” made up of malignant cells)
Silver-staining spherical aggregation of tau proteins in neurons
Pick bodies (Pick’s 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 glomerulonephritis (may progress to nephrotic syndrome)
Stacks of RBCs
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 (Langerhans cell histiocytosis or histiocytosis X: eosinophilic granuloma)
Thrombi made of white/red layers
Lines of Zahn (arterial thrombus, l ayers of platelets/RBCs)
Thumb sign on lateral x-ray
Epiglottitis (Haemophilus influenzae)
Thyroid-like appearance of k idney
Chronic bacterial pyelonephritis
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
Lupus nephropathy
Yellowish CSF
Xanthochromia (e.g., due to subarachnoid hemorrhage)