Metanephric adenoma managed with robotic partial nephrectomy: A case report

Abstract

Introduction: Metanephric adenomas (MAs) are clinically uncommon, with less than 200 cases previously documented. Preoperatively, MAs are difficult to diagnose due to the similarity of imaging characteristics with renal cell carcinomas. Even though MAs are benign tumors, they require careful consideration and treatment. We report a case of a MA managed via active surveillance followed by partial nephrectomy. Case Report: After presenting for abdominal pain, a 1.3 cm left renal mass was diagnosed in a 58-year-old woman. Active surveillance was initially used to manage the mass for 2 years, at which point she elected for robotic partial nephrectomy. Final histopathological diagnosis was MA. Conclusion: Preoperative diagnosis of MA is difficult as it shares many characteristic similarities with renal cell carcinomas. It is important for Urologists to be aware of MA as a diagnostic possibility. As awareness and understanding of MA increase, and diagnostic strategies continue to improve, active surveillance strategies may be increasingly utilized in management. If surgical extirpation is ultimately required, partial nephrectomy is a successful and reasonable approach