Michael C. Nicoson & Thomas H. H. Tung
A 2-year-old boy presents to the clinic with fusion of the long and ring fingers.


  • Complete, likely simple, syndactyly involving right long and ring fingers.



  • Patient′s current hand function

    • Symmetric/asymmetric use of hands.

    • Grasping style.

  • Known medical comorbidities.

  • Family history of syndactyly or other associated condition (autosomal dominant or sporadic).

  • Difficulties during pregnancy.

Physical examination

  • Perform full body examination.

    • Other congenital anomalies may have not yet been diagnosed. Consider syndromic etiology if appropriate.

    • Evaluate feet to rule out additional digits with syndactyly.

  • Perform complete hand evaluation.

    • Assess for extent and location of webbing, as well as for the number of digits involved.

      • Assess for polydactyly.

      • Evaluate for digital deviation in the radial or ulnar plane (clinodactyly).

    • Examine contralateral hand for comparison.

    • Thoroughly evaluate entire upper extremity.

  • Classification

    • Simple/complex

      • Simple syndactyly: Finger fusion only by a skin bridge.

      • Complex syndactyly: Finger fusion involving bone connection.

    • Complete/incomplete

      • Complete syndactyly: Fusion involves entire length of the finger to distal tip, including nail fold.

      • Incomplete syndactyly: Fusion does not involve nail fold, but web depth is distal to normal position.

    • Complicated: Includes polydactyly.

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Jun 18, 2020 | Posted by in General Surgery | Comments Off on Syndactyly
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