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Journal of Case Reports
Large Renal Oncocytoma: A Rare Entity
Anuj Kumar1, Hemant Goel1, Umesh Sharma1, Arvind Ahuja2, Sumit Gahlawat1, Rajeev Sood1 
1Department of Urology and Renal Transplant and 2Department of Pathology, PGIMER & Dr RML Hospital, New Delhi, India.
Corresponding Author:
Dr. Hemant Goel
Email: hemant.doc81@gmail.com
Received: 24-MAR-2019 Accepted: 28-JUL-2019 Published Online: 10-SEP-2019
DOI: http://dx.doi.org/10.17659/01.2019.0049
Abstract
Background: Renal oncocytoma accounts for 3 to 7% of all solid renal masses. Large renal oncocytomas (4 kg or more) are rare and only few cases are reported till date. Case Report: A 44 year old man presented with sudden onset right flank pain and large right abdominal lump. Further evaluation revealed a large heterogeneous mass not seen separately from right kidney. Intra-operatively a huge right renal mass (approximately 20 cm and 4.5 kg in weight) along with areas of necrosis and hemorrhage, completely replacing renal parenchyma was seen. Histopathology and immunohistochemistry was suggestive of oncocytoma. Conclusion: The renal oncocytoma can be differentiated from malignant RCCs by histopathology and immunohistochemically.
Keywords : Flank Pain, Kidney Neoplasms, Male, Renal Cell Carcinoma, Renal Oncocytoma.
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