title: Renal oncocytoma: report of two cases and review of literature.
abstract: Renal oncocytoma was previously reported as a benign tumor arising from proximal tubular epithelial cells, but malignant potential with local invasion and distant metastasis has been emphasized in recent literature. It is difficult to differentiate it from renal cell carcinoma, but four typical angiographical signs may give suggestive evidence of the tumor. Radical nephrectomy with lymphadenectomy may be the choice of treatment, except in solitary kidney, bilateral tumors, or contralateral renal cell carcinoma. We report two female patients who were found incidentally to have renal tumors during a survey of right upper quadrant pain. Typical angiographic signs were found incidentally to have renal tumors during a survey of right upper quadrant pain. Typical angiographic signs were found in one patient, and atypical signs in the other. Three and eight years after radical nephrectomy with para-aortic lymphadenectomy, there has been no evidence of local recurrence or distant metastasis.
authors.affiliation: Department of Surgery and Pathology, Taichung Veterans General Hospital, Taiwan, Republic of China.
authors.forename: C C
authors.initials: CC
authors.lastname: Shen
authors.forename: T I
authors.initials: TI
authors.lastname: Hwang
authors.forename: C R
authors.initials: CR
authors.lastname: Yang
authors.forename: C L
authors.initials: CL
authors.lastname: Chang
authors.forename: C H
authors.initials: CH
authors.lastname: Chang
authors.forename: Y C
authors.initials: YC
authors.lastname: Ou
authors.forename: L P
authors.initials: LP
authors.lastname: Chan
mesh_terms: D000236:Adenoma / Q000175:diagnosis / Q000473:pathology* / Q000628:therapy; D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D007680:Kidney Neoplasms / Q000175:diagnosis / Q000473:pathology* / Q000628:therapy