An unreported accessory muscle on the neck region

Year 2024, Volume: 15 Issue: 52, 92 - 95, 02.09.2024

Sezgi Gürçay , Merve Önder , Gökçe Akyol , Nurettin Oğuz

https://doi.org/10.17944/interdiscip.1371839

Abstract

Anatomical variations or accessory muscles on the neck region are important for clinicians and surgeons. This case report aims to contribute to the literature by demonstrating the presence of a previously unrecognized muscle on the lateral neck region. During routine gross anatomy dissection of a 59-year-old male cadaver; an unreported muscle was observed next to the scalene muscles on the left lateral neck region. The distance between the center of the scalenus medius and the insertion of the muscle was 6.17 cm, and the distance between the scapular notch and the insertion of the muscle was 1.56 cm. The distance between the aponeurosis that connects the superior and the inferior bellies of the omohyoideus muscle and the first head of the muscle was 6.24 cm. This anatomical formation, which is not included in the literature, has anatomical and clinical importance in controversial clinical cases in neck pathologies.

Keywords

Accessory muscle, Clinical anatomy, Lateral neck region, Neck surgery, Variation

References

• Standring S. Gray's anatomy e-book: the anatomical basis of clinical practice: Elsevier Health Sciences; 2021.
• Abakay MA, Güneş S, Küçük C, Yazıcı ZM, Gülüstan F, Arslan MN, et al. Accessory Nerve Anatomy in Anterior and Posterior Cervical Triangle: A Fresh Cadaveric Study. Turk Arch Otorhinolaryngol. 2020;58(3):149. https://doi.org/10.5152/tao.2020.5263
• Kang DW, Byeon Y, Yoon SP. An accessory belly of the sternothyroid muscle on the anterior neck. Surg Radiol Anat. 2015;37:215-7. https://doi.org/10.1007/s00276-014-1295-5
• Mansoor SN, Rathore FA. Accessory Clavicular Sternocleidomastoid Causing Torticollis in an Adult. Prog Rehabil Med. 2018;3:20180006. https://doi.org/10.2490/prm.20180006
• Natsis K, Piagkou M, Vrochidis P, Papadopoulou E, Lazaridis N. Unilateral asymmetrical anterior bellies of the digastric muscle in coexistence with accessory muscle bundles in the submental triangle: A rare case report. Morphologie. 2018;102(337):83-6. https://doi.org/10.1016/j.morpho.2017.10.001
• Natsis K, Piagkou M, Lazaridis N, Anastasopoulos N. Asymmetry of the Accessory Anterior Digastric Muscle Bellies: The Clinical Significance in Facial and Neck Surgery. Cureus. 2020;12(2):e7148. https://doi.org/10.7759/cureus.7148
• Ortug G, Sipahi B, Ortug A, Ipsalali H. Variations of the digastric muscle and accessory bellies-A study of gross anatomic dissections. Morphologie. 2020;104(345):125-32. https://doi.org/10.1016/j.morpho.2019.09.189
• Yuen SN, Gengler I, Badhey AK, Tang AL, Zender C. Absent Posterior Belly of Digastric Muscle. The Laryngoscope. 2021;131(7):1501-2. https://doi.org/10.1002/lary.29317
• Anderson H, Tucker R. A cadaveric analysis of anatomical variations of the anterior belly of the digastric muscle. Folia Morphol. 2021;80(3):691-8. https://doi.org/10.5603/FM.a2020.0105
• Sarna K, Ngeow WC, Kandimalla A, Estreed MA, Sonigra KJ, Kamau M. More than two–A cadaveric study on the morphometry and classification of the digastric muscle in a selected kenyan population. Morphologie. 2022. https doi.org/10.1016/j.morpho.2022.06.001
• Silawal S, Morgan S, Ruecker L, Schulze-Tanzil G. A unilateral sternopharyngeal branch of the sternocleidomastoid muscle in an aged Caucasian male: a unique cadaveric report. Folia Morphol. 2022. https://doi.org/10.5603/FM.a2022.0016
• Wang X, Zou H, Chen J, Zhang H, Fu Y, Wang Y, et al. An unusual sternalis with variation of the contralateral sternocleidomastoid muscle: a case report. Surg Radiol Anat. 2022;44(7):987-90. https://doi.org/10.1007/s00276-022-02980-1
• Hsiao TH, Chang HP. Anatomical variations in the digastric muscle. The Kaohsiung J Med Sci. 2019;35(2):83-6. https://doi.org/10.1002/kjm2.12012
• Ozgur Z, Govsa F, Ozgur T. Bilateral quadrification of the anterior digastric muscles with variations of the median accessory digastric muscles. J Craniof Surg. 2007;18(4):773-5. https://doi.org/10.1097/scs.0b013e318068ff09
• Fayed M, Khalil S, Patel N, Hussain A. Unexpected Anatomical Variation While Performing an Ultrasound-Guided Interscalene Block for Shoulder Surgery. Cureus. 2022;14(5). https://doi.org/10.7759/cureus.25079
• Rani A, Chopra J, Rani A, Verma RK. Duplicated anterior belly of the digastric muscle. Singapore Med J. 2013;54(6):e131-e2. https://doi.org/10.11622/smedj.2013117