

McqMate
Q. |
A 52-year-old woman who is a nonsmoker has a 3-cm right inguinal lymph node.Biopsy specimen shows a poorly differentiated malignancy that is difficult to characterize by light microscopy. The biopsy specimen is negative for leukocyte common antigen, cytokeratin, and estrogen receptors. Which of the following additional tests would best establish the source of this tumor? |
A. | Bone scan |
B. | Measurement of serum carcinoembryonic antigen |
C. | Stain for S-100 |
D. | Measurement of serum CA 19-9 |
Answer» C. Stain for S-100 |
View all MCQs in
Important Questions Repeated in MD ExamsNo comments yet