AP Questions Part 3 Flashcards
What do each of these classifications of dissecting aortic aneurysm entail?
A) Stanford A
B) Stanford B
C) DeBakey I
D) DeBakey II
E) DeBakey IIIA
F) DeBakey IIIB
A) ascending +/- descending
B) descending
C) ascending and descending
D) ascending
E) descending, extends proximal and distal
F) descending, extends distal
What is the mutation associated with a) AML and b) CML?
A) 15;17 most common, but
8;21 RUNX1 (good prognosis) vs inv3, t(3;3) or t(6,9) poor prognosis
B) 9;22 BCR-ABL1
How do muscle cells differ in atrophy patterns in neurogenic atrophy vs myopathies?
Neurogenic: early polygonal atrophy, nuclear clumping, grouped
Myopathy: round atrophy mixed with hypertrophy, scattered, necrosis/fibrosis, increased nuclei
What are the pertinent IHC for basaloid SCC?
UEA-1+, AE1/3+
But Ber-EP4-, MOC-31-
(Unlike BCC)
What mutation and what variant of PTC is seen with FAP?
APC mutation, cribriform morular variant (which histologically has squamoid metaplasia)
*APC mutation is also in Gardner’s and Turcot
What defines the following categories of AML, NOS: 1) AML with minimal differentiation 2) AML without maturation 3) AML with maturation?
1) <3% of blasts stain for Sudan black or MPO
2) >3% of blasts stain for Sudan black or MPO, <10% granulocytes
3) granulocytes >=10% of blast cells
What mutation is seen in a) adamantinomatous craniopharyngioma and b) papillary craniopharyngioma?
A) beta-catenin
B) BRAFV600E
What mutation is seen in pilocytic astrocytoma, and what IHC is positive?
KIAA1549::BRAF
GFAP+, Olig2+, SOX10+
What is CD5 and CD10 in marginal zone B cell lymphoma?
CD5-, CD10-
What is the difference between dermatofibroma and DFSP?
DFSP is CD34+ and infiltrates adipose tissue
Dermatofibroma is factor XIIIa+
What is Meigs syndrome?
Ovarian fibroma, ascites, right pleural effusion
What is the most common mutation in a) lung adenocarcinomas and specifically mucinous? B) micropapillary lung? C) solid/cribriform with signet cell features?
a) KRAS
B) EGFR
C) ROS1 and ALK
What is the thymoma classification (A, B1, B2, B3, AB, C)?
A: spindled
B1: epitheloid < lymphocytes
B2: epithelioid = lymphocytes
B3: epitheloid > lymphocytes
AB: spindled + lymphocytes
C: carcinoma
What IHC stains for fibromatosis / what part of the cell?
Nuclear beta-catenin
What mutation is seen in In Fragile X Syndrome?
FMR1 methylation from CGG trinucleotide repeat
(Fragile Male)
What excess cell type does granular cell tumor contain? Oncocytoma?
GCC: lysosomes
Onco: mitochondria
What tumors are most specific for calretinin+, inhibin+, melanA+?
Adrenal cortical tumors
What is the specimen type reccommended for urothelial carcinoma DNA ploidy analysis and how should it be collected?
Bladder washings (barbatoge)
Second void of day, 30 mL, delivered within 12 hrs (>12: fix in ethanol)
How to distinguish squamoid eccrine ductal carcinoma from SCC on IHC?
CEA+, EMA+ (typically + in glandular tissue like Adnexal, not squamous), p63
What are the most common materials used as a bullet’s primer (3)? Cartridge?
Bullet: BAL: barium, antimony, and lead
Cartridge: brass (alloy of zinc and copper)
What do you see in histology for gynecomastia?
DUCTAL proliferation with prominent rims of edematous stroma
What is seen on histology with diabetic mastopathy?
Fibrotic/sclerotic stroma and lymphocytic infiltrate of blood vessels and lobules
What are the 3 hormonal breast marker findings in invasive lobular breast carcinoma?
ER+, PR+, Her2- (also E-cad-)
What is the IHC staining for fibromatosis (beta catenin, CD-34, SMA)? How to differentiate from fibromatosis-like metaplastic carcinoma?
Beta-catenin+, CD34-, SMA+
Cytokeratins+ in metaplastic carcinoma