Symptomatic Idiopathic Ulnar Nerve Instability in the Elbow Diagnostic Considerations and 1-Year Outcomes After Anterior Transposition of Ulnar Nerve.

The mean age of the patients at the time of surgery was 37.8 years (range: 18 to 57 years). The mean duration of symptoms prior to surgery was 15.7 ± 4.9 months. All five patients reported neuritis symptoms in the distribution of ulnar nerve in the hand and had ulnar nerve instability in the cubital tunnel on clinical examination. All patients were symptom free within 6 months after anterior transposition of the ulnar nerve.