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Anomalous Extensor Indicis With an Intermediate Tendon: Surgical and Functional Considerations.

Nidhi Sunhare1, Padamjeet Panchal1

  • 1Anatomy, All India Institute of Medical Sciences Patna, Patna, IND.

Cureus
|June 8, 2026
PubMed
Summary

A rare double-bellied extensor indicis proprius (EIP) muscle with an intermediate tendon attached to the wrist capsule was found. This anatomical variant has implications for hand surgery and understanding muscle development.

Keywords:
anatomical variationcadaveric dissectiondorsal digital extensor expansiondorsal wrist capsuledouble-bellied muscleextensor indicis propriusextensor retinaculumfourth extensor compartmenttendon transfertenosynovitis

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