06-01-2010, 07:20 PM
A pathology resident is reviewing the slides from a pediatric
neoplasm with his attending. The tumor is composed
of small round blue cells. Molecular testing of the
tumor revealed a t(11;22). Immunohistochemical staining
of the tumor cells is positive for CD99. These findings
are most consistent with a tumor that originated
A. in the vagina
B. in the diaphysis of the tibia
C. in the kidney
D. in a jaw mass
neoplasm with his attending. The tumor is composed
of small round blue cells. Molecular testing of the
tumor revealed a t(11;22). Immunohistochemical staining
of the tumor cells is positive for CD99. These findings
are most consistent with a tumor that originated
A. in the vagina
B. in the diaphysis of the tibia
C. in the kidney
D. in a jaw mass