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Delayed Treatment of Giant Oncocytoma; A Case Report

Okigbeye Danagogo, Anslem Iyama, Ovunda Omodu, Vitalis Ofuru, Egbuchilem Chisor-Wabali

Abstract

Renal tumors may be malignant or benign. Oncocytomas are one of the common renal tumors. 30% of tumors less than 2cm are benign they are usually asymptomatic. Some patients with oncocytomas may have symptoms like abdominal pain and haematuria. A 72 ear old man presented with a progressively increasing abdominal swelling of 6 years duration. There was no pain, no haematuria, no change in bowel habits. He was not jaundiced and did not have facial or pedal oedema. His blood work was essentially normal with a creatinine of 98µmol/L and a haemoglobin level of 12g/dl. A contrast enhanced Computer tomography scan showed a huge, heterogeneously enhancing left renal mass. He has exploratory laparotomy with left nephrectomy. The tumor weighed 4.3kg and measured 26x22cm. Histology of the lesion revealed an oncoytoma with no pericapsular invasion. Renal oncocytomas were first described by Zippel in 1942 and were initially thought to be malignant. Oncocytoma of the kidney occurs more in the seventh decade of life and more common in males than females. There are no definitive criteria on CT scan to differentiate oncocytomas from renal cell carcinomas though oncocytomas may have a central scar and hypervascularity. This does not definitely identify oncocytoma. Oncocytoma may coexist with renal cell carcinoma. There are varied opinions as to the ideal treatment for oncocytoma. Most surgeons prefer to operate on the patient.

Keywords

Renal tumors Renal oncocytoma

References

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