Accessory extensor pollicis longus from the extensor digitorum: a rare case report and review of the literature.

Autor: Taradolpisut N; Department of Anatomy, Faculty of Science, Mahidol University, Bangkok, Thailand.; In Silico and Clinical Anatomy Research Group (iSCAN), Bangkok, Thailand., Suwannakhan A; Department of Anatomy, Faculty of Science, Mahidol University, Bangkok, Thailand.; In Silico and Clinical Anatomy Research Group (iSCAN), Bangkok, Thailand., Berkban T; Department of Anatomy, Faculty of Medicine, Khon Kaen University, Nai-Muang, Muang District, Khon Kaen, 40002, Thailand., Chaiyamoon A; Department of Anatomy, Faculty of Medicine, Khon Kaen University, Nai-Muang, Muang District, Khon Kaen, 40002, Thailand., Yurasakpong L; Princess Srisavangavadhana College of Medicine, Chulabhorn Royal Academy, Bangkok, Thailand., Iwanaga J; Department of Neurosurgery, Tulane University School of Medicine, New Orleans, LA, USA.; Department of Oral and Maxillofacial Anatomy, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.; Tulane Center for Clinical Neurosciences, Tulane University School of Medicine, New Orleans, LA, USA.; Department of Neurology, Tulane Center for Clinical Neurosciences, Tulane University School of Medicine, New Orleans, LA, USA.; Department of Structural & Cellular Biology, Tulane University School of Medicine, New Orleans, LA, USA., Tubbs RS; Department of Neurosurgery, Tulane University School of Medicine, New Orleans, LA, USA.; Tulane Center for Clinical Neurosciences, Tulane University School of Medicine, New Orleans, LA, USA.; Department of Neurology, Tulane Center for Clinical Neurosciences, Tulane University School of Medicine, New Orleans, LA, USA.; Department of Structural & Cellular Biology, Tulane University School of Medicine, New Orleans, LA, USA.; Department of Anatomical Sciences, St. George's University, St. George's, Grenada.; Department of Surgery, Tulane University School of Medicine, New Orleans, LA, USA.; Department of Neurosurgery and Ochsner Neuroscience Institute, Ochsner Health System, New Orleans, LA, USA.; University of Queensland, Brisbane, Australia., Kruepunga N; Department of Anatomy, Faculty of Science, Mahidol University, Bangkok, Thailand.; In Silico and Clinical Anatomy Research Group (iSCAN), Bangkok, Thailand., Georgiev GP; Department of Orthopedics and Traumatology, University Hospital Queen Giovanna-ISUL, Medical University of Sofia, Sofia, Bulgaria., Samrid R; Department of Anatomy, Faculty of Medicine, Khon Kaen University, Nai-Muang, Muang District, Khon Kaen, 40002, Thailand. rarisa@kku.ac.th.
Jazyk: angličtina
Zdroj: Surgical and radiologic anatomy : SRA [Surg Radiol Anat] 2023 Jul; Vol. 45 (7), pp. 911-916. Date of Electronic Publication: 2023 Apr 27.
DOI: 10.1007/s00276-023-03155-2
Abstrakt: Purpose: Variations of the extensor pollicis longus are rare. When present, these include a separate extensor pollicis longus muscle, tendon or an intertendinous connection with nearby tendons within the deep extensor compartment of the forearm. Here, we report an extremely rare variation of an accessory extensor pollicis longus originating from the extensor digitorum.
Methods: An unusual muscle was found during the routine dissection forearm of a 71 year-old at death male cadaver.
Results: This variant muscle originated from part of the extensor digitorum muscle belly that supplies the index finger. It became tendinous and entered the third extensor compartment of the wrist before joining the ulnar side of the extensor pollicis longus tendon. Traction on the muscle belly resulted in simultaneous extension of both the thumb and the index finger.
Conclusion: This study documents an extremely rare extensor tendon to the thumb originating from the extensor digitorum, with a unique attachment to the normal extensor pollicis tendon. There have been minimal accounts of this variation, and the present report adds to the limited literature. Furthermore, the report suggests a new subtype, 1f, be included in the existing classification system. Surgeons should be aware of this rare variant for proper evaluation, diagnosis and surgical treatment. Further anatomical studies are needed to study the prevalence of this variant.
(© 2023. The Author(s), under exclusive licence to Springer-Verlag France SAS, part of Springer Nature.)
Databáze: MEDLINE
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