二腹肌前腹单侧发育不全伴对侧肥大：一例报告

Unilateral hypoplasia with contralateral hypertrophy of anterior belly of digastric muscle: a case report.

作者信息

Ochoa-Escudero Martin, Juliano Amy F

机构信息

Department of Radiology, Neuroradiology Section, Hospital Pablo Tobón Uribe, Calle 78B # 69-240, Medellín, Colombia.

Massachusetts Eye and Ear Infirmary and Harvard Medical School, Boston, MA, USA.

出版信息

Surg Radiol Anat. 2016 Oct;38(8):973-4. doi: 10.1007/s00276-016-1630-0. Epub 2016 Jan 28.

DOI:10.1007/s00276-016-1630-0

PMID:26820886

Abstract

Anomalies of the anterior belly of the digastric muscle (DM) are uncommon. We present a case of hypoplasia of the anterior belly of the left DM with hypertrophy of the anterior belly of the contralateral DM. The importance of recognizing this finding is to differentiate hypoplasia of the anterior belly of the DM from denervation atrophy, and not to confuse contralateral hypertrophy with a submental mass or lymphadenopathy. In denervation atrophy of the anterior belly of the DM, associated atrophy of the ipsilateral mylohyoid muscle is present. Hypertrophy of the anterior belly of the contralateral DM can be differentiated from a submental mass or lymphadenopathy by recognizing its isodensity on computed tomography and isointensity on magnetic resonance imaging to other muscles, without abnormal contrast enhancement.

摘要

二腹肌前腹（DM）异常并不常见。我们报告一例左侧DM前腹发育不全，对侧DM前腹肥大的病例。认识到这一发现的重要性在于将DM前腹发育不全与失神经萎缩相鉴别，且不要将对侧肥大与颏下肿物或淋巴结病相混淆。在DM前腹失神经萎缩时，同侧下颌舌骨肌会出现相关萎缩。对侧DM前腹肥大可通过计算机断层扫描上的等密度以及磁共振成像上与其他肌肉的等信号强度来与颏下肿物或淋巴结病相鉴别，且无异常对比增强。