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In vivo Measurement of Knee Extensor Muscle Function in Mice
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Anatomical variations in the first extensor compartment: a cadaver study.

Hao Xu1, Ji-Xia Wu2, Qiang Wang3

  • 1Department of Joint Surgery, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China.

ANZ Journal of Surgery
|August 18, 2018
PubMed
Summary
This summary is machine-generated.

Two novel anatomical variations in the first extensor compartment were identified in cadaveric dissections. These findings highlight potential contributors to de Quervain

Keywords:
anatomical variationsde Quervain's diseasethe first extensor compartment

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Area of Science:

  • Anatomy
  • Orthopedics
  • Pathology

Background:

  • Anatomical variations within the first extensor compartment are implicated in the development of de Quervain's disease.
  • Understanding these variations is crucial for accurate diagnosis and treatment of wrist conditions.

Purpose of the Study:

  • To document and describe two previously unreported anatomical variations of the first extensor compartment.
  • To enhance awareness of potential anatomical anomalies that may contribute to de Quervain's disease pathogenesis.

Main Methods:

  • Dissection of the wrists of two adult cadavers.
  • Detailed examination of the structures within the first extensor compartment.

Main Results:

  • Cadaver 1: Absence of a septum in the first extensor compartment, with the extensor pollicis brevis tendon and its proximal muscle belly also absent. Multiple abductor pollicis longus (APL) tendon slips were observed, with one inserting on the dorsal base of the proximal thumb phalanx.
  • Cadaver 2: Presence of a septum within the first extensor compartment. A slip of the multiple APL tendons coursed within the septum alongside the extensor pollicis brevis tendon before inserting with the APL tendon into the base of the first phalanx.

Conclusions:

  • The identification of these novel anatomical variations contributes to the understanding of first extensor compartment morphology.
  • Increased awareness of such variations may aid clinicians in diagnosing and managing de Quervain's disease.