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Updated: Apr 17, 2026

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[The Linburg-Comstock phenomenon: a review]
Michael C Kirchberger1, P Hahn1, F Unglaub1
1Abteilung für Handchirurgie, Vulpius Klinik, Bad Rappenau.
Summary
The Linburg-Comstock phenomenon involves thumb and finger flexion due to abnormal tendon connections. Surgical resection of an accessory tendon successfully treated a patient experiencing pain and weakness after a thumb injury.
Area of Science:
- Orthopedic Surgery
- Hand Surgery
- Anatomy
Background:
- The Linburg-Comstock phenomenon describes the simultaneous flexion of the thumb and fingers.
- This occurs due to congenital or acquired abnormal connections (coupling) between the flexor pollicis longus (FPL) and flexor digitorum profundus (FDP) tendons.
- Coupling can manifest in muscles, tendon sheaths, or the tendons themselves, and may be asymptomatic or symptomatic.
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