Abstract
IntroductionRenal oncocytomas are benign neoplasms derived from cells of the distal renal tubule, and comprise 5% to 7% of primary renal neoplasms. Oncocytomas are mostly asymptomatic, and the majority of tumors are discovered incidentally. In this case report, we present a case of a patient with a giant oncocytoma arising from her left kidney.Case presentationWe describe a 25-year-old Turkish woman who was admitted to our hospital with abdominal pain and a 3-year palpable abdominal mass, which was found present since her second pregnancy. Examination revealed a 15 × 20-cm mass in her abdominal cavity. Computed tomography revealed a mass with regular outlines, measuring 18 × 11 × 12 cm, associated with the left kidney, and causing marked hydroureteronephrosis. We excised the mass and performed a left nephrectomy on our patient. The immunohistopathology of the mass was consistent with renal oncocytoma. No local or distant metastasis was seen at 6 months postoperatively.ConclusionTo the best of our knowledge, this is the second largest renal oncocytoma described in the English language literature. This is also the first reported giant oncocytoma that presented during pregnancy.
Highlights
Renal oncocytomas are benign neoplasms derived from cells of the distal renal tubule, and comprise 5% to 7% of primary renal neoplasms
To the best of our knowledge, this is the second largest renal oncocytoma described in the English language literature
This is the first reported giant oncocytoma that presented during pregnancy
Summary
Oncocytomas are benign, nonurothelial, epithelial tumors that constitute 5% to 7% of primary renal neoplasms. Four years prior to presentation, during her second pregnancy, she was admitted to a hospital because of abdominal pain, and an ultrasonographic examination revealed an abdomi-. Her laboratory results at the time of presentation were as follows: hemoglobin, 13 g/dl; white blood cell count, 10,500/cm; platelets, 302,000/cm; sodium, 135 mEq/L; potassium, 4.1 mEq/L; blood urea nitrogen, 28 mg/dl; creatinine, 1.1 mg/dl; glucose, 110 mg/dl; aspartate aminotransferase (AST), 36 IU/L; and alanine aminotransferase (ALT), 41 IU/L. Her right kidney appeared to be within normal limits on the IVP and CT. There were no foci of clear cell changes, necrosis, or mitotic figures
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
