Surgical Principles
Improvement of pinching ability and opposition motion in cases of absence or marked hypoplasia of the thenar muscles.
Transposition of the abductor digiti minimi muscle to the thumb in an own modification: lengthening by shifting its origin
under careful preservation of blood and nerve supply to the palmaris longus tendon to give better appearance and enough to
reach the metacarpophalangeal joint of the thumb and the extensor pollicis longus tendon.
Key Words Opponensplasty - Abductor digiti minimi - Hypoplastic thumb - Congenital anomalies of the hand