Traumatic injury of the third palmar interosseous muscle in a patient with dementia: A case report()

An 81-year-old man with dementia presented with a third palmar interosseous injury. A fourth flexor digitorum superficialis tendon transfer surgery was performed the following day. The patient achieved adduction of the little finger; however, flexion contracture that began 2 months after the surgery progressed until completion because of issues related to postoperative rehabilitation and home exercise. An injury of the third palmar interosseous muscle is extremely rare and is even more uncommon in older adults. Therefore, careful consideration must be given to determine whether surgery is the best choice, especially if the patient has dementia.