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Accessory extensor pollicis longus: A rare tendon anomaly.

D Tordjman1, J Pierrart2, J Bellity2

  • 1Division of hand surgery, department of orthopedic surgery, Tel-Aviv-Sourasky medical center, Weizmann St 6, Tel Aviv, Israel.

Hand Surgery & Rehabilitation
|December 18, 2017
PubMed
Summary
This summary is machine-generated.

A rare anatomical variation, the accessory extensor pollicis longus (EPL) tendon, is reviewed. This asymptomatic tendon, found in the fourth extensor compartment, can extend the thumb interphalangeal joint.

Keywords:
Anatomical variationCompartiment des extenseursExtensor compartmentExtensor pollicis longusExtensor tendonLong extenseur du pouceSupernumerarySurnuméraireTendon extenseurVariation anatomique

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Area of Science:

  • Anatomy
  • Orthopedics
  • Surgical Anatomy

Background:

  • The extensor pollicis longus (EPL) tendon is crucial for thumb extension.
  • Anatomical variations of the EPL tendon are infrequently reported.
  • Understanding variations is vital for surgical procedures involving the wrist and thumb.

Observation:

  • A case of an asymptomatic accessory EPL tendon is presented.
  • The anomalous tendon was incidentally discovered within the fourth extensor compartment during surgery.
  • Manual manipulation of the accessory tendon resulted in thumb interphalangeal joint extension.

Findings:

  • Accessory EPL tendons are rare, with diverse origins and insertions reported in literature.
  • Previously reported symptomatic cases involved tendons in compartments other than the fourth.
  • This variation is typically asymptomatic, as observed in the presented case.

Implications:

  • Awareness of accessory EPL tendon variations is important for surgeons.
  • It aids in preventing inadvertent iatrogenic injury to the anomalous tendon during wrist surgeries.
  • Knowledge assists in accurate diagnosis and management of potential complications, such as tendon rupture or entrapment.