title: An anomalous flexor digitorum superficialis muscle-tendon unit associated with ulnar neuropathy. A case report.
abstract: A previously undescribed accessory flexor digitorum superficialis muscle-tendon unit was discovered on surgical exploration of the wrist in an 18-year-old girl with symptoms of distal ulnar neuropathy and a volar soft-tissue mass. Excision of the muscle-tendon unit resulted in complete resolution of symptoms. The preoperative diagnosis of an accessory muscle is difficult, being commonly mistaken for synovitis, ganglia, or tumor.
mesh_terms: D000293:Adolescent; D005260:Female; D005385:Fingers; D006801:Humans; D009132:Muscles / Q000002:abnormalities*; D010292:Paresthesia / Q000209:etiology*; D013710:Tendons / Q000002:abnormalities*; D014459:Ulnar Nerve; D014953:Wrist