Intraneural nodular fasciitis: case report and literature review.

Nodular fasciitis is a benign or reactive myofibroblastic soft tissue tumor that occurs most frequently in the forearm but has been reported throughout the body. Nodular fasciitis has not been reported to arise within a peripheral nerve, and we present a case of intraneural nodular fasciitis within the ulnar nerve at the distal forearm. Preoperative symptoms of advanced ulnar neuropathy resolved completely after intraneural dissection and subtotal resection of the tumor.