Figure 1: Surgical images and radiological data of transperitoneal laparoscopic unroofing. (a) The seminal cyst (1) was exposed under laparoscopic procedures, and vas deferens (2) was dissected and used as the guiding duct toward the cystic lesion. (b) The wall of seminal cyst was resected and remnant lesional rim was electrocoagulated. The vas deferens remained intact (arrow). (c) Preoperative CT image of the seminal cyst, the lesion was large and protruding into abdominal cavity (arrow). (d) The rechecking CT image took at 6 months after the laparoscopic surgery, and the cyst lesion was completed removed with no evidence of recurrence (arrow). CT: Computed tomography.