title: Clinically undiagnosed prostate carcinoma metastatic to renal oncocytoma.
abstract: Tumors-to-tumor metastasis is an uncommon occurrence and can be a source of great diagnostic difficulty, especially when the donor tumor is undiagnosed. Here we report a case of a kidney resected for a primary neoplasm (oncocytoma) that harbored metastases from a clinically undiagnosed prostatic adenocarcinoma. The presence of the poorly differentiated metastasis within an otherwise typical oncocytoma in the absence of metastases in the surrounding nonneoplastic renal parenchyma resulted in a diagnostic dilemma. To our knowledge, this is the first report of a case in the English literature of a clinically undiagnosed prostatic adenocarcinoma metastatic to a renal oncocytoma identified on examination of the resected renal neoplasm.
authors: Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, NE 68198, USA.
authors: Adam J
authors: AJ
authors: Horn
authors: Bari E
authors: BE
authors: Fritz
authors: Chad A
authors: CA
authors: Lagrange
authors: William W
authors: WW
authors: West
authors: Subodh M
authors: SM
authors: Lele