Transfer of upper pectoralis major flap for functional reconstruction of deltoid muscle.

Since January 1984, functional reconstruction of the deltoid muscle using transfer of the upper part of the pectoralis major muscle has been performed in 7 patients with deltoid dysfunction. 5-20 months follow-up (average 11) revealed marked improvement in 6 patients. During the operation, the superior and inferior parts of the pectoralis major muscle were bluntly dissected and sectioned. The upper part of this muscle was turned over and transferred to the site normally occupied by the deltoid muscle. The transposed muscle contributed to both abduction and flexion of the shoulder. The efficacy of abduction was reinforced by the increased arm of action.