Sesamoids are bones which are not connected to other bones, but are instead connected to tendons or embedded in the muscle. The largest sesamoid is the kneecap. Sesamoids are also found in the feet and the hands.
Sesamoids can break or fracture, causing the tendons surrounding the sesamoids to become inflamed or irritated. This condition is referred to as sesamoiditis, a specific form of tendonitis. It is common in baseball catchers, runners, and ballet dancers.
History and physical exam by a qualified musculoskeletal expert is the first step. The physician will look for tenderness during the examination. X-ray or MRI scanning may be required.
Treatment is generally non operative. Options recommended include rest and stopping the activity that caused the injury. Pain relievers or splinting may be recommended.