Bifocal Metanephric Adenoma in a Patient with Non-hodgkin Lymphoma

Metanephric adenoma (MA) is a rare benign renal tumor. Radiology does not clearly differentiate between this benign lesion and renal carcinoma accurately. We report the case of a woman with history of non-Hodgkin lymphoma. CT scan showed nodules in one kidney, and radical nephrectomy was performed under the appearance of hypernephroma. Two lesions were identified, and the histopathological diagnosis was MA. No other MA has been reported in patients with non-Hodgkin lymphoma. The correct diagnosis of this tumor prevents radical nephrectomy. In the current report we describe two foci of tumor, and being MA usually solitary, its benign characteristics might be more challenging.