Manske P R, McCarroll H R, James M
St. Louis Shriners Hospital for Crippled Children, MO, USA.
J Hand Surg Am. 1995 Mar;20(2):246-53. doi: 10.1016/S0363-5023(05)80018-8.
Thirteen type III-A hypoplastic thumbs were reviewed. The abnormalities included those found in type II hypoplasia (narrow thumb-index web space, hypoplastic thenar muscles, unstable metacarpophalangeal joint, as well as extrinsic tendon abnormalities); all had stable carpometacarpal joints. They are differentiated from type III-B hypoplastic thumbs, which have an unstable carpometacarpal joint due to a deficient base of the metacarpal. The extrinsic tendon abnormalities included absent extensor pollicis longus tendon, absent or aberrant flexor pollicis longus tendon, and a tendon interconnection between the flexor pollicis longus and extensor aponeurosis. Twelve of the thumbs had surgical reconstruction. None was treated with ablation and index pollicization.
对13例III-A型发育不全拇指进行了回顾性研究。异常情况包括II型发育不全中发现的那些（拇指-示指蹼间隙狭窄、大鱼际肌发育不全、掌指关节不稳定以及外在肌腱异常）；所有病例的腕掌关节均稳定。它们与III-B型发育不全拇指不同，后者由于掌骨基部发育不全而导致腕掌关节不稳定。外在肌腱异常包括拇长伸肌腱缺如、拇长屈肌腱缺如或异常以及拇长屈肌腱与伸肌腱膜之间的肌腱连接。其中12例拇指接受了手术重建。均未采用切除和示指拇指化治疗。
