Focal myositis of the sternocleidomastoid muscle: a rare and uncommon cause of cervical mass

We report on a 70-year-old male patient admitted to the internal medicine department for evaluation of a right cervical mass. He had been treated with antibiotics as an outpatient by his primary care doctor. Upon admission the patient was asymptomatic, but within a few hours his cervical mass enlarg...

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Bibliographic Details
Main Authors: Léa Docquier, Xavier Jannot, Zaida Córdoba-Sosa, Léa Pierre, Pierre Alexis Austrusseau, Emmanuel Andres, Noel Lorenzo Villalba
Format: Article
Language:English
Published: SMC MEDIA SRL 2023-05-01
Series:European Journal of Case Reports in Internal Medicine
Subjects:
Online Access:https://www.ejcrim.com/index.php/EJCRIM/article/view/3919
Description
Summary:We report on a 70-year-old male patient admitted to the internal medicine department for evaluation of a right cervical mass. He had been treated with antibiotics as an outpatient by his primary care doctor. Upon admission the patient was asymptomatic, but within a few hours his cervical mass enlarged; this enlargement was confined to the right sternocleidomastoid muscle. Complete blood investigations including serology and autoimmunity were negative. The neck scan and MRI were in favour of myositis. No other lesions were found either in the nasal fibre-optic exam or in the thoracic-abdominal-pelvic scan. The biopsy of the muscle showed a lymphoplasmacytic inflammatory infiltrate of the perimysium. The diagnosis of focal myositis was made. The patient clinically improved during hospitalisation with complete resolution of symptoms without any specific intervention.
ISSN:2284-2594