Caption: Transverse view of the right side of the neck
Description: A well-defined, oval, hypoechoic solid mass is seen posterior to the right lobe of thyroid and medial to the carotid. The mass has a homogeneous echotexture and a demarcating capsule, indicating its extra-thyroidal location.
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Caption: Sagittal view of the right side of the neck
Description: The hypoechoic solid mass is seen here located posterior to the thyroid gland.
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Caption: Color Doppler of the mass
Description: Vessels are demonstrated within the extra-thyroidal mass. This pattern of vascularity is more consistent with a parathyroid adenoma rather than a lymph node which typically demonstrates central hilar flow.
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Caption: Power Doppler study of the mass
Description: There is increased vascularity in this mass compared to the adjacent thyroid vascularity, which is often seen with parathyroid adenoma.
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