Caption: Sagittal image of the left neck.
Description: Ultrasound demonstrates a 1.9 cm long solid, mildly hypoechoic and heterogeneous mass in the left neck.
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Caption: Sagittal image of the left neck.
Description: Sagittal sonogram shows that the mass is intramuscular, within the left sternocleidomastoid muscle.
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Caption: Color Doppler of the mass.
Description: Color Doppler demonstrates vascularity within the intramuscular mass.
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Caption: Spectral Doppler of the mass.
Description: Spectral Doppler documents arterial flow within the mass, demonstrating high-resistance flow.
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Caption: Sagittal image of the left neck.
Description: This sagittal image confirms the intramuscular location of the elongated mass within the sternocleidomastoid muscle.
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Caption: Transverse image of the thyroid.
Description: Sonogram shows a normal thyroid. This confirms that the mass is not of thyroid origin.
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