Pelvic clear cell adenocarcinoma in a 14-year-old boy

Clear cell adenocarcinoma is a descriptive term assigned to rare tumors of the urogenital tract of unknown histogenesis. Based on anatomical location and microscopic similarities to renal cell carcinoma a mesonephric origin has been supported.(1) To our knowledge clear cell adenocarcinoma unassociated with the urothelium arising in the pelvis of a male adolescent has not been reported previously. Morphological evaluation, including immunological staining, and electron and light microscopy, demonstrated characteristics similar to those of mesonephric adenocarcinoma despite an inability to determine the organ of origin.