metanephric adenoma: a case report of a rare benign renal tumor

Introduction: metanephric adenoma (ma) is a rare benign kidney tumor with an excellent prognosis, which is usually diagnosed incidentally with no symptoms. the mean age of patients with ma is about 41 years, ranging from 5 months to 83 years in previous studies. case presentation: in this study, we present the case of a 29-year-old woman with a diagnosis of ma after nephrectomy. the ultrasound study showed a hyperechoic mass. the intravenous (iv) contrast-enhanced abdominopelvic computed tomography (ct) scan showed a hypodense mass. based on the results of pathological features and immunohistochemistry (ihc) (positive vimentin, wt1, and pax8), the diagnosis of ma was established. conclusions: the diagnosis of ma is commonly based on pathological findings. therefore, if ma is suspected, renal biopsy, partial nephrectomy, or follow-up of the patient can be used. however, further studies are needed to differentiate ma from papillary renal cell carcinoma and nephroblastoma before taking aggressive measures.