ArticleIJU case reports2026
Giant Adrenal Oncocytoma: A Case Report and Literature Review.
Article in IJU case reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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10 authors.
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Abstract
Introduction: Adrenal oncocytomas are rare, nonfunctioning tumors composed of eosinophilic oncocytic cells whose nonspecific imaging often impedes preoperative diagnosis. We report a case of a large nonfunctioning adrenal oncocytoma with borderline malignant potential, incidentally discovered during cardiac symptom evaluation. Case Presentation: A 77-year-old man with an incidentally discovered retroperitoneal tumor was referred to Urology for further evaluation. Contrast-enhanced CT revealed a 93-mm lobulated mass with heterogeneous enhancement abutting the left kidney's upper pole. Given the tumor's size, open left nephrectomy and adrenalectomy were performed. Gross and histopathology revealed a yellowish, solid adrenal tumor composed predominantly of oncocytic cells with no invasion of the kidney. Immunohistochemistry revealed a low Ki-67 index (approximately 2%). The tumor was classified as having borderline malignant potential (Lin-Weiss-Bisceglia criteria). Conclusion: We present a rare case of nonfunctioning adrenal oncocytoma with borderline malignant potential. Long-term follow-up is recommended due to the uncertain malignant potential.
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