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Metanephric Adenoma: A Case Report of a Rare Benign Renal Tumor Publisher



Allameh F1 ; Ahadi M2 ; Faraji S3 ; Hojjati SA4
Authors
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Authors Affiliations
  1. 1. Urology and Nephrology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
  2. 2. Department of Pathology, Shahid Beheshti University of Medical Sciences, Tehran, Iran
  3. 3. Department of Psychiatry, Tehran University of Medical Sciences, Tehran, Iran
  4. 4. Department of Urology, Shahid Beheshti University of Medical Sciences, Tehran, Iran

Source: International Journal of Cancer Management Published:2021


Abstract

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 ul-trasound 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. © 2021, Author(s).