A review of articles from last month's Archives of Pathology & Laboratory Medicine. (Test Your Memory).

Listed below are questions based on articles that appeared in last month's issue of the ARCHIVES. Registered continuing medical education participants should use the February 2002 answer sheet to answer these questions. Answers appear inverted at the bottom of the page.

1. The differential diagnosis for mesoblastic nephroma
   includes (Figure 1):
   a. Wilms tumor
   b. clear cell sarcoma
   c. rhabdoid tumor
   d. metanephric stromal tumor
   e. all of the above
(from Pathologic Quiz Case: A Renal Tumor in a Newborn Child--Wu)

[FIGURE 1 OMITTED]

2. Mycobacterium mucogenicum may be specifically identified by
   ribosomal sequencing.
   True or False?
(from Mycobacterium mucogenicum Isolated From a Patient With
Granulomatous Hepatitis--Goldblatt & Ribes)

3. The best immunohistochemical marker for confirming the diagnosis
   of angiomyolipoma is:
   a. HMB-45
   b. melan-A
   c. mitf
   d. tyrosinase
(from Melanoma Markers in Angiomyolipoma of the Liver and
Kidney--Makhlouf et al)

4. Reduced or absent E-cadherin has been described to be associated
   with dedifferentiation, invasion, and/or metastasis in epithelial
   neoplasms of the (Figure 2):
   a. colon
   b. ovary
   c. stomach
   d. pancreas
   e. all of the above
(from Expression of E-Cadherin and p53 Proteins in Human Soft Tissue
Sarcomas--Yoo et al)

[FIGURE 2 OMITTED]

5. Patients with comedo ductal carcinoma in situ with a cribriform
   or papillary pattern or tumor involving more than 4 mm with lobular
   extension in breast core needle specimens are at increased risk for
   invasion at excision.
   True or False?
(from Predicting Invasion in the Excision Specimen From Breast Core
Needle Biopsy Specimens With Only Ductal Carcinoma In Situ--Renshaw)

6. p18 protein expression is closely associated with high-grade
   oligodendrogliomas and worse clinical outcome.
   True or False?
(from Immunohistochemical Analysis of p18INK4C and p14ARF Protein
Expression in 117 Oligodendrogliomas--Korshunov & Golanov)

Answer to this month's questions: 1, e. 2, True. 3, a.
4, e. 5, True. 6, True.