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Research Article| Volume 2, ISSUE 3, P179-193, May 1977

Congenital triangular bones in the hand

  • Virchel E. Wood
    Correspondence
    Reprint requests: Virchel E. Wood, M.D., Loma Linda University Medical Center, Loma Linda, Calif. 92354.
    Affiliations
    From the Department of Orthopedic Surgery and Rehabilitation, Loma Linda University Medical Center, Loma Linda, Calif.

    The Division of Hand Surgery, the Department of Orthopaedic Surgery, University of Iowa, Iowa City, Iowa.
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  • Adrian E. Flatt
    Affiliations
    From the Department of Orthopedic Surgery and Rehabilitation, Loma Linda University Medical Center, Loma Linda, Calif.

    The Division of Hand Surgery, the Department of Orthopaedic Surgery, University of Iowa, Iowa City, Iowa.
    Search for articles by this author
      This paper is only available as a PDF. To read, Please Download here.
      From the literature we found reports of 105 patients whom we judged had a triangular deformity of one of the bones of the hand or foot. We found 49 patients of our own with 84 delta-shaped phalanges limited strictly to the hand. This represents an incidence of 3.5 percent of our congenital abnormalities of the upper extremity. The deformity is associated with many abnormalities; syndactyly, Polydactyly, symphalangism, triphalangeal thumb, cleft hand, and hypoplastic hand are the most frequent. Triangular deformity of the bone of the index finger usually is associated with Apert's syndrome. Triangular deformity of the proximal phalanx of the ring finger often is found with central Polydactyly. Our average follow-up time on these 49 patients was 14 years, giving us a chance to establish some guidelines and general rules about the natural history and treatment of the delta bone.
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