Laparoscopic Renal-Sparing Radical Excision of a Perirenal Sclerosing Well-Differentiated Liposarcoma - A Case Report and Literature Review

A 72-year-old man presented with a 12×8×4 cm soft tissue mass located in the upper pole of the left kidney. The inferior pole of the kidney was encased by the mass. To minimize surgical damage, we performed laparoscopic renalsparing excision of the mass via transperitoneal route. In an effort to obtain negative surgical margins, the capsule of the kidney was resected along with the mass. The operation lasted 135 min and the estimated blood loss was 100 ml. No perioperative complications were encountered. Pathology confirmed the mass to be a retroperitoneal perirenal sclerosing well-differentiated liposarcoma. All surgical margins were negative. During the past 18-month follow-up, the patient reported no complaints and showed no recurrence of the tumor. Excision of the liposarcoma mass along with the renal capsule provided the patient the best opportunity to have negative surgical margins and kidney preservation. The laparoscopic renal-sparing radical excision of perirenal well-differentiated liposarcoma was safe and feasible. However, the indication should be carefully reviewed by taking into consideration the size and location of the tumors and the surgeon's preference. The long-term outcomes of the laparoscopic surgery will need to be determined.