What is the initial symptom often experienced by patients with cubital tunnel syndrome?

• A. Pain in the thumb
• B. Sensory changes in the first digit
• C. Pain in the 4th and 5th digits
• D. Forearm weakness

Answer: (C)

Cubital tunnel syndrome is characterized by compression of the ulnar nerve at the elbow, typically resulting in symptoms that affect the areas innervated by this nerve. The ulnar nerve is primarily responsible for sensory and motor function in the fourth (ring) and fifth (little) digits.

Patients with cubital tunnel syndrome commonly first notice symptoms such as pain, tingling, or numbness specifically in the fourth and fifth digits. This is due to irritation of the nerve as it passes through the cubital tunnel—a bony structure at the inner aspect of the elbow. The initial experience of discomfort or altered sensation in these fingers is a key indicator of ulnar nerve involvement, making it a hallmark symptom of cubital tunnel syndrome.

Such specific sensory changes reflect the anatomical distribution of the ulnar nerve and highlight the condition's localized effects on nerve function. Understanding this can deepen your appreciation for the clinical presentation of cubital tunnel syndrome and aid in diagnosis and management strategies.