Desai S S, Morgan W J
Department of Orthopedics and Physical Rehabilitation, University of Massachusetts Medical Center, Worcester.
J Hand Surg Am. 1991 Nov;16(6):1052-5. doi: 10.1016/s0363-5023(10)80068-1.
We report an unusual case of locked thumb in a 24-year-old man, caused by entrapment of the radial sesamoid in the metacarpophalangeal joint. Tomography clearly revealed sesamoid entrapment in the joint. Surgical exploration and cadaver dissection demonstrated that avulsion of the proximal portion of the palmar plate and some dissociation of the sesamoid from the palmar plate with intraarticular displacement were necessary for the sesamoid to be trapped in the joint.
我们报告了一例罕见的24岁男性拇指绞锁病例，病因是桡侧籽骨被困于掌指关节。断层扫描清晰显示籽骨被困于关节内。手术探查和尸体解剖表明，掌板近端撕脱以及籽骨与掌板部分分离并伴有关节内移位，是籽骨被困于关节的必要条件。
