Which syndrome is an entrapment neuropathy of the median nerve?

• A. Tendonitis
• B. Pronator Teres Syndrome
• C. Epicondylitis
• D. De Quervain's Tenosynovitis

Answer: (B)

The key idea is that this condition is a nerve compression of the median nerve as it passes through the forearm, specifically between the two heads of the pronator teres muscle. When the nerve gets trapped there, it causes sensory symptoms in the median nerve distribution of the forearm and hand, and can produce weakness of median-innervated muscles. This is why Pronator Teres Syndrome is described as an entrapment neuropathy.

Tendon-related problems like tendonitis, epicondylitis, or De Quervain’s tenosynovitis, on the other hand, involve inflammation or degeneration of tendons and tendon sheaths. They cause localized elbow or wrist pain and tenderness without the characteristic numbness, tingling, or motor weakness in the median nerve distribution that results from nerve compression. That distinction is what makes this option the correct choice.