A newborn with an abnormal left arm post-difficult delivery is diagnosed with what condition?

The condition being described is likely Erb Duchenne palsy. This condition typically arises from an injury to the upper trunk of the brachial plexus, often occurring during difficult deliveries, particularly when excessive lateral traction is applied to the head and neck.

In a newborn, the classical presentation of Erb Duchenne palsy includes weakness or paralysis of the affected arm, which will often appear adducted and internally rotated at the shoulder, with the elbow extended. This aligns with the scenario described, where the newborn has an abnormal left arm following a challenging delivery, suggesting a disruption to the normal neuromuscular function in that limb due to the described injuries.

Understanding how Erb Duchenne palsy manifests clinically is crucial in diagnosing and treating this condition effectively. The implications for the newborn include potential physical therapy and monitoring for recovery, which are essential steps in management.