What deformity characterizes Klumpke Palsy?

Klumpke Palsy is characterized by a claw hand deformity, which results from an injury to the lower trunk of the brachial plexus, particularly affecting the C8 and T1 nerve roots. This condition often occurs due to excessive pulling on the arm during delivery or trauma that impacts the arm.

The deformity manifests as a hand that resembles a claw, where the fourth and fifth digits (the ring and little fingers) are flexed at the proximal interphalangeal joints while the metacarpophalangeal joints remain extended. This is due to the paralysis of the intrinsic hand muscles, which are responsible for the fine motor control and flexion of the fingers. As a result, the person affected by Klumpke Palsy has difficulty with grasping and performs poorly in activities that require finger dexterity.

In contrast, the other options describe different conditions or presentations associated with other types of brachial plexus injuries or nerve damage. For instance, wrist drop is indicative of radial nerve injury, while the "waiter's tip" posture is associated with upper trunk injuries affecting the upper roots of the brachial plexus (C5-C6). Shoulder droop can occur due to spinal accessory nerve involvement or