Far lateral lumbar disc herniation (FLLDH) is a rare type of intervertebral disc herniations based on its anatomical location. A herniated lesion compressing the exiting nerve root superiorly makes clinical symptoms of lumbar radiculopathy. We report a 77-year-old female patient presenting lower back pain, left buttock pain and numbness, radiating pain, tingling sensation on the left lower extremity. Radiological images revealed a 16.2x13.8x7.2 mm sized mass like lesion outside the left foraminal canal of the L5-S1 disc space, mimicking nerve sheath tumor at a extradural location. Histopathological examination of the specimen was confirmed as a sequestrated disc fragments.
We conclude that preoperative careful evaluation should be exercised for the differential diagnosis of the extraforaminal soft mass.
