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Omohyoid muscle syndrome (OMS) is one of the rare causes of lateral neck swelling during swallowing and it is often a worrisome observation due to the concern of malignancy and cosmetic deformity. Anatomical variation, congenital weakness, or trauma may cause incompetence of the fascial-retaining mechanism and subsequently OMS. Its prevalence is unknown as only a few cases were reported in the past and none in Malaysia. Diagnosing OMS is very challenging. Hence, imaging techniques like real time ultrasound or dynamic computed tomography can be useful in assessing the affected muscles.
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