Locking metacarpophalangeal joint of the thumb.
D000293:Adolescent; D000328:Adult; D001265:Athletic Injuries / Q000601:surgery; D002648:Child; D006801:Humans; D007596:Joints / Q000293:injuries*; D008023:Ligaments, Articular / Q000293:injuries; D008297:Male; D008663:Metacarpus / Q000002:abnormalities*; D012716:Sesamoid Bones / Q000293:injuries; D013933:Thumb / Q000293:injuries*