Type III-A hypoplastic thumb

Paul R. Manske, H. R. McCarroll, Michelle James

Research output: Contribution to journalArticlepeer-review

83 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)246-253
Number of pages8
JournalJournal of Hand Surgery
Issue number2
StatePublished - 1995
Externally publishedYes

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Surgery


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