![]() ![]() ![]() 12 However, until now there has been no study demonstrating the prevalence of sesamoid bone in an East Asian population in English literature. 14 Recently, the data from the Arabic population was also reported. 13 In African people, the distribution was largely different to Caucasians. ![]() The prevalence and distribution of sesamoid bones in the hands is known to be variable among populations of various geographic origins.11, 12 It was reported that the incidence of thumb sesamoid bone is 100%, and that of the MP joints of index and little fingers is roughly 35% and 70%, respectively, in Caucasians. 5 Inflammation, arthritic changes and painful clicking were reported as clinical features.6, 7, 8 Trigger thumb was also observed in association with the sesamoid bone, mimicking stenosing tendinopathy.9, 10 Furthermore, sesamoid bones can themselves be fractured 4 or trapped inside the joint after a fracture-dislocation. The sesamoid bone can be easily misdiagnosed as an avulsion fracture fragment, especially in comminuted articular fractures. Proper knowledge about the location of the sesamoid is important in the differential diagnosis of hand diseases. The sesamoid bone, usually embedded in the tendon near the joint, has the role of maximizing the lever arm of the tendon and functions as a pulley.1, 2, 3 In the hand, sesamoid bones are usually found in the metacarpo-phalangeal (MP) joint of the thumb, index, and little finger. ![]()
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