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Case Rep Urol. 2019 Aug 8;2019:6016870. doi: 10.1155/2019/6016870. eCollection 2019.

Palpable Abdominal Mass is a Renal Oncocytoma: Not All Large Renal Masses are Malignant.

Author information

1
Spectrum Health, Department of Urology, Grand Rapids, MI, USA.
2
Spectrum Health, Department of Pathology, MI, USA.
3
Michigan State University College of Human Medicine, Grand Rapids, MI, USA.

Abstract

A 59-year-old woman presented with abdominal pain and a palpable abdominal mass. Initial imaging revealed a 14cm solid, enhancing renal mass and suspicion for liver and bone metastases. Family history included a brother with clear cell renal cell carcinoma and mother with glioblastoma multiforme. After liver biopsy was inconclusive, she underwent radical nephrectomy with final pathologic diagnosis of oncocytoma. Renal oncocytoma is the most common benign renal tumor but remains difficult to distinguish clinically and radiographically from renal cell carcinoma. Should urologists use renal mass biopsy even more frequently prior to surgical intervention?

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