Citation, DOI, disclosures and article data
Citation:
Rasuli B, Feger J, Weerakkody Y, Biceps tendon with accessory head. Reference article, Radiopaedia.org (Accessed on 25 Apr 2024) https://doi.org/10.53347/rID-94894
The accessory head of the biceps brachii muscle is a normal anatomical variant and incidentally seen in some individuals with shoulder problems who were referred for shoulder MRI.
The prevalence of the condition has been reported in 9.1-22.9% of the population especially in the Asian groups.
On MRI, an accessory biceps tendon displays a hypointense structure within the bicipital groove that is usually flattened and can be misdiagnosed as a longitudinal tear of the long head of the biceps tendon without carefully following the origin of the accessory tendon.
Additional origins of the accessory bicipital head include the articular capsule of the glenohumeral joint, humerus tuberosities, and coracoid process 1-3.
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1. Warner J, Paletta G, Warren R. Accessory Head of the Biceps Brachii. Case Report Demonstrating Clinical Relevance. Clin Orthop Relat Res. 1992;(280):179-81. - Pubmed
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2. Nakatani T, Tanaka S, Mizukami S. Bilateral Four-Headed Biceps Brachii Muscles: The Median Nerve and Brachial Artery Passing Through a Tunnel Formed by a Muscle Slip from the Accessory Head. Clin Anat. 1998;11(3):209-12. doi:10.1002/(sici)1098-2353(1998)11:3<209::aid-ca10>3.0.co;2-n
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3. Gheno R, Zoner C, Buck F et al. Accessory Head of Biceps Brachii Muscle: Anatomy, Histology, and MRI in Cadavers. AJR Am J Roentgenol. 2010;194(1):W80-3. doi:10.2214/ajr.09.3158 - Pubmed
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