Figure 1
Neck CT showing a low-attenuation mass in the tongue with internal calcifications (thick arrow in A). The contrast-enhanced images demonstrate septa-like structures within the cystic mass (thin arrows in C, E, and F). The bilateral sublingual glands are displaced inferiorly by the mass (arrowhead in D).
Figure 2
Neck MRI showing a cystic mass that is hyperintense on T2WI (A) and isointense on T1WI (B) with internal calcifications observed as punctate hypointensities on T2WI (arrowhead in A). The contrast-enhanced T1WIs reveal thin enhancements at the internal septations and peripheral wall of the mass (arrows in C, E, and F). The fat-suppressed T2WI show no evidence of fat components in the mass (D). The diffusion-weighted and apparent diffusion coefficient images show no significant diffusion restriction (G and H).
Figure 3
Histopathological examination reveals abundant mucin pools lined with goblet cells, suggestive of intestinal-type epithelium. Floating epithelial cells with areas of nuclear dysplasia and transition to adenocarcinomas are observed within the mucin on hematoxylin-eosin staining (arrow in B). The tumor cells show strong positive staining for CK20 (C) and negative staining for CK7 (D), AR (E), and P63 (F): magnification ×100 (A) and ×200 (B–F).
Figure 4
The positron emission tomography/CT images show no evidence of increased uptake in any location, except at the resection margin of the tongue.