Diagnostic value of high-frequency ultrasound in omohyoid muscle syndrome

To investigate the diagnostic value of high-frequency ultrasound in omohyoid muscle syndrome. A retrospective analysis of 11 patients diagnosed with omohyoid muscle syndrome was carried out, and the characteristics of high-frequency ultrasound images were summarized. Ultrasonography of the omohyoid muscle showed a narrow band of hypoechoic muscle bundle. The ultrasonographic manifestation of omohyoid muscle syndrome showed a thickening of the omohyoid muscle on the affected side. The omohyoid muscle on the affected side bulged forward during swallowing and lifted the overlying sternocleidomastoid muscle. The difference between the thickness of the omohyoid muscle intermediate tendon on the affected side and the healthy side at rest was statistically significant (t = 58.23, P < 0.001). The difference between the thickness of the affected omohyoid muscle intermediate tendon at rest and during swallowing was statistically significant (t = 14.57, P < 0.001). There was no statistically significant difference between the thickness of the omohyoid muscle intermediate tendon on the healthy side at rest and during swallowing (t = 0.56, P > 0.05). High-frequency ultrasound is the preferred imaging method in the diagnosis of omohyoid muscle syndrome.