An unusual cause of medial arm pain.

A 21-year-old woman came to the student health facility reporting left medial arm pain. The pain had occurred intermittently over the last year after strenuous upper-body weight lifting, especially biceps curls. She had recently noticed a bump on the inside of her left arm at the site of pain. The bump was present continuously despite the intermittent nature of her pain. No numbness, tingling, or loss of arm strength were noted, and she did not have neck, shoulder, elbow, or wrist pain, or similar symptoms in the opposite arm. The patient had no history of fractures, other bone abnormalities, or trauma to this area. She was not currently taking medication and was not using supplements.