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Metacarpal Small Incision for Carpal Tunnel Syndrome
Published on: April 5, 2024
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Palmaris profundus in the carpal tunnel
Theodore Paul Pezas1, Rajive Jose2
1St George's University Hospital, St George's University Hospitals NHS Foundation Trust, London, UK.
BMJ Case Reports
|August 17, 2021
Summary
Carpal tunnel release surgery can be complicated by the palmaris profundus, a rare anatomical variant. Awareness of this variant is crucial to prevent accidental median nerve damage during carpal tunnel decompression.
Area of Science:
- Anatomy
- Orthopedic Surgery
- Neurology
Background:
- Carpal tunnel release is a common surgical procedure to alleviate median nerve compression.
- Idiopathic causes are most frequent, but secondary causes are also recognized.
- Median nerve compression can lead to carpal tunnel syndrome (CTS).
Observation:
- The palmaris profundus is a rare anatomical variant distinct from the palmaris longus tendon.
- This variant courses under the flexor retinaculum, potentially reducing carpal tunnel space.
- Cases report close association between palmaris profundus and the median nerve within the carpal tunnel.
Findings:
- The palmaris profundus can act as a secondary cause of median nerve compression.
- Its anatomical course may contribute to or cause carpal tunnel syndrome.
- Intimate association with the median nerve is frequently observed in affected individuals.
Implications:
- Increased awareness of the palmaris profundus is vital for surgeons performing carpal tunnel decompression.
- Recognition can help prevent iatrogenic injury to the median nerve.
- Understanding this anatomical variant improves surgical outcomes and patient safety.
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