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Accessory flexor pollicis longus tendon - a clinical and cadaveric study
Ahmadreza Afshar1, Ali Tabrizi1, Mohammad Javad Shariyate2
1Department of Orthopedics, Imam Khomeini Hospital, Urmia University of Medical Sciences, Iran.
The Journal of Hand Surgery, European Volume
|June 12, 2025
Summary
An accessory flexor pollicis longus tendon was identified in over 47% of trigger thumb release patients and in cadavers. This anatomical variant
Area of Science:
- Anatomy
- Orthopedic Surgery
- Human Anatomy
Background:
- Trigger thumb (flexor tenosynovitis) is a common condition.
- Anatomical variations can influence surgical outcomes.
Purpose of the Study:
- To investigate the prevalence of accessory flexor pollicis longus tendon.
- To analyze the anatomical and clinical significance of this variant.
Main Methods:
- Retrospective analysis of 53 trigger thumb release surgeries.
- Examination of 5 randomly selected cadaveric thumbs.
- Histopathologic analysis of identified variants.
Main Results:
- Accessory flexor pollicis longus tendon found in 25 of 53 patients (47%).
- Variant identified in 2 of 5 cadaveric thumbs (40%).
- Cadaveric and histopathologic analyses confirmed the variants.
Conclusions:
- Accessory flexor pollicis longus tendon is a notable anatomical variant.
- Understanding this variant is crucial for trigger thumb release surgery.
- Further research into its clinical and evolutionary significance is warranted.
