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First extensor compartment morphology and clinical significance: a cadaver series study
Osman Coşkun1, Fatma Ok1, Büşra Şahin1
1Department of Anatomy, Istanbul Faculty of Medicine, Istanbul University, Istanbul, Turkey.
Anatomy & Cell Biology
|March 29, 2023
Summary
Anatomical variations in the first extensor compartment, including septum presence and multiple abductor pollicis longus (APL) tendons, are common. Understanding these variations is key for diagnosing and treating de Quervain
Area of Science:
- Anatomy
- Orthopedics
- Medical Imaging
Background:
- The first extensor compartment of the wrist exhibits significant anatomical variability.
- These variations are implicated in the development and treatment resistance of de Quervain's disease, a common wrist tenosynovitis.
Purpose of the Study:
- To detail the morphology of the first extensor compartment.
- To assess the frequency and location of septa within the compartment.
- To quantify the number of tendons for the abductor pollicis longus (APL) and extensor pollicis brevis (EPB) muscles.
Main Methods:
- Dissection of 87 wrists from 45 cadavers.
- Evaluation of septum presence/absence and APL/EPB tendon slip counts.
- Measurement of proximal and distal compartment widths.
Main Results:
- Septa were found in 60.9% of dissected wrists.
- Incomplete (distal) and complete (proximal) septa occurred in 35.6% and 25.3% of cases, respectively.
- Multiple APL tendon slips were observed in 73.6% of wrists; only 26.4% had a single slip.
Conclusions:
- The high prevalence of septa and multiple APL tendon slips highlights significant anatomical variability in the first extensor compartment.
- This detailed anatomical understanding, particularly in the Turkish population, is crucial for surgeons, radiologists, and physiotherapists in managing de Quervain's disease.
- Accurate diagnosis and effective treatment strategies for de Quervain's disease can be improved by recognizing these common anatomical variations.
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