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Jeannes Sign

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Jeannes Sign
Illustration of abnormal Jeanne's Sign
Demonstration of Jeanne's sign
Jeanne's sign
  • Jeanne's Sign
  • Jeanne's Sign Test
  • Jeanne phenomenon
  • Thumb MCP hyperextension sign (ulnar nerve palsy)
  • Hyperextension sign of the thumb MCP joint
  • Ulnar nerve pinch compensation sign

Purpose

  • Evaluate Cubital Tunnel and Ulnar Nerve as a cause of elbow pain
  • Named after French physician M. Jeanne, who first described the clinical observation in 1915[1]

Description

  • Patient is asked to pinch together thumb and index finger forming an "OK" sign
  • Positive test:
    • Weak and unstable pinch with hyperextension of the thumb metacarpophalangeal, thumb adduction
    • Compensating for loss of interphalangeal extension and thumb adduction by Adductor Pollicis

Pathology

Evidence

  • Unknown

See Also

References

  1. ↑ Jeanne M. La deformation du pouce dans la paralysie cubitale. Bull Mem Soc Chir. 1915;41:703e719.
Created by:
John Kiel on 30 December 2019 22:53:39
Authors:
Last edited:
11 January 2026 10:19:37
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