Laparoscopic resection of a dumbbell-shaped lipoma extending through the obturator foramen: A case report.

Lipomas are often lightweight and small in size with few subjective symptoms. Giant lipomas are uncommon. We herein report a case involving a giant, deep-seated dumbbell-shaped intermuscular lipoma in the right thigh that extended into the pelvic region through the obturator foramen and caused obturator neuropathy. A 64-year-old man with numbness while walking was diagnosed with a 17 × 16-cm lipomatous tumor. He underwent radical surgery performed by a multidisciplinary team consisting of orthopedic and colorectal surgeons. High-definition magnified laparoscopic images of the deep pelvis confirmed that tumor had infiltrated the obturator nerve. The tumor was completely resected with the obturator nerve. Six months after surgical resection, the patient had no gait disturbance or evidence of recurrence. The laparoscopic approach for this kind of complicated deep pelvic surgery was safe and feasible when performed by colorectal surgeon with ample knowledge of the pelvic anatomy.