A dumbbell-shaped peripheral obturator nerve sheath tumor

Peripheral nerve sheath tumors are very rare to arise from the obturator nerve. As such, they are usually not considered one of the imaging diagnostic possibilities for a cystic-solid pelvic mass. The present case involves a 32-year-old man with a known pelvic mass who complained of increasing discomfort in his pelvic region along with swelling over his left inguinal area. The tumor was reported to exhibit mixed solid and cystic components after being tracked with serial imaging for 5 years.