Hypoplastic Digits and Hands

Scott H. Kozin

History and Clinical Presentation

A 4-year-old boy presented with a congenital anomaly of his left hand (Fig. 79—1). He is the product of a full-term pregnancy, born via cesarean section. There were no problems during pregnancy or delivery. The child is right hand dominant, but he is able to grasp cups and utensils with his left hand. He is otherwise healthy and has attained his developmental milestones (e.g., sitting, walking, and talking) at the normal time. Past medical history is positive for a heart murmur at birth that has resolved over time.

Physical Examination

The patient is a healthy-appearing and attentive child with full motion of his left shoulder, elbow, forearm, and wrist. The left thumb is normal in size and motion when compared with the right. The index, long, ring, and small digits are diminished in size (Fig. 79—1). The index finger has a remnant of proximal phalanx present and a small nail. The long and ring fingers have no bony support distal to the metacarpal. There are skin tubes distal to the metacarpal with small nails present. The small digit is larger than the other fingers with full metacarpophalangeal joint motion, but no active or passive motion of the proximal interphalangeal joint. The distal phalanx is inclined in a radial direction and the distal inter-phalangeal joint motion is 0 to 40 degrees. The right upper extremity and legs are normal. No chest wall abnormalities were noted. No amniotic bands were present on any of the extremities.

Hypoplastic Digits Pictures
Figure 79—1. (A) Dorsal view of a 4-year-old child with small index, long, and ring digits and rudimentary nails. (B) Palmar view of shortened digits and radial deviation of the small finger.
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