FIG 2. CT scans.

A, Noncontrast axial CT scan shows a well-defined submental mass with central, low attenuation. A solid mural component is present. CT attenuation number of central portion is 20.2 H. There is no remarkable fat infiltration adjacent to the mass.

B, Contrast-enhanced axial CT scan shows moderately enhanced peripheral wall and nodular mural components (white arrowheads). Mass abuts partly to the hyoid bone, at its medial aspect.

C, Contrast-enhanced coronal CT scan shows a thick central solid septa (white arrowhead). The hyoid bone (white arrow) is located next to the medial aspect of the lesion. The boundary between the upper part of the mass and mouth floor is indistinct.