A case of central metanephric adenoma successfully treated with laparoscopic nephron-sparing surgery.

Metanephric adenoma is an extremely rare renal tumor and, even more infrequently, is centrally located. Herein we summarize a series of images concerning a central metanephric adenoma in a female adult successfully treated with laparoscopic nephron-sparing surgery. The patient presented with no symptoms but was found to have a lesion in the middle portion of the left renal parenchyma for 1 month prior. She underwent retroperitoneal laparoscopic nephron-sparing surgery with total resection of the renal mass. To our knowledge, we present here the most detailed, challenging, and complicated laparoscopic nephron-sparing surgery yet to be reported with a diagnosis of metanephric adenoma in the central location.