case_images: PMC10453962_01
case_images: 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).
case_images: jbsr-107-1-3156-g1.jpg
case_images: PMC10453962_01_jbsr-107-1-3156-g1.jpg
case_images: F1
case_images: CT images showed a low-attenuation mass with multifocal internal calcifications, and septa-like structures were observed within the mass (Figure 1).
case_images: 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).
case_images: jbsr-107-1-3156-g2.jpg
case_images: PMC10453962_01_jbsr-107-1-3156-g2.jpg
case_images: F2
case_images: T2-weighted imaging (T2WI) and isointense on T1-weighted imaging (T1WI) with thin enhancing internal multiseptations (Figure 2). There was no evidence of pathological lymph node in the neck.
case_images: 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 x100 (A) and x200 (B-F).
case_images: jbsr-107-1-3156-g3.jpg
case_images: PMC10453962_01_jbsr-107-1-3156-g3.jpg
case_images: F3
case_images: After histopathological analysis of the excised mass, the final diagnosis was mucinous adenocarcinoma (Figure 3), and tumor involvement at the resection margin was positive.
case_images: The positron emission tomography/CT images show no evidence of increased uptake in any location, except at the resection margin of the tongue.
case_images: jbsr-107-1-3156-g4.jpg
case_images: PMC10453962_01_jbsr-107-1-3156-g4.jpg
case_images: F4
case_images: The patient underwent positron emission tomography/CT scan to exclude the possibility of a metastatic lesion from a primary intestinal malignancy, and there was no evidence of a metabolically active lesion in any location other than the resection margin of the tongue (Figure 4).