Extravasation Mucocele Arising from a Lingual Thyroglossal Duct Remnant

Figure 1

(a) Sagittal T1-weighted (TR/TE, 585/10), (b) sagittal T2-weighted (TR/TE, 4000/100), and (c) axial T2-weighted (TR/TE, 4000/100) MR images of the neck. The round mass (large arrow) has a homogenous low signal intensity in (a) and a high signal intensity in (b) and (c), suggesting a cystic lesion. In (b), there is a black and white striped tract (arrowhead) from the hyoid bone (small arrow) to the mass (large arrow), suggesting the thyroglossal duct.

(a)

(b)

(c)