Thyroglossal Duct Carcinoma Originating in the Hyoid Bone

Figure 1

CT of the neck. (a) Axial noncontrast CT at the level of the hyoid bone shows a well-defined, low-density mass expanding the cortex of the hyoid bone with partial bone destruction (arrow). Punctate calcifications are seen within the mass (arrowhead). (b) Axial contrast-enhanced CT at the same level as (a) shows marked enhancement of the solid component (arrow). (c, d) Sagittal at the midline (c) and axial at the infrahyoid level (d) images of contrast-enhanced CT show the mass consists of a solid component and a marginal cystic component (arrows). Left submental lymphadenopathy is also seen (arrowhead).

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