PMC6421763_01
PET scan.
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fig1
On control PET, which was performed for the patient again due to mass complaints, there was a mass with left submandibular gland localization, invading the left lateral wall of the larynx and destroying the left side of the hyoid bone (Figure 1).
Contrast-enhanced axial (CT) image: expansile mass originating from the left side of the hyoid bone with cystic-necrotic components and calcific foci (arrows). The mass produces compressive effect on the left submandibular gland (S) and vallecula.
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fig2
(a) Axial fat-sat T2 MRI image shows marked hyperintense mass with lobulated contours (arrows). There are metastatic lymph nodes within the left submandibular area (open arrow) and both sides of the neck lymph node chain (asterisk) with similar signal characteristics. (b) Axial T1 MRI image demonstrates effacement of the fat planes between the mass (M) and the left submandibular gland (S). (c) Coronal contrast-enhanced fat-sat T1 image reveals that the mass has an heterogeneous peripheral and central enhancement with some cystic-necrotic components (arrows).
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fig3
(a) Nodular chondroid fields, x2, H&E. (b) Nodular chondroid areas, stellate and lacunae, atypical, pleomorphic cells, x10, H&E. (c) Pleomorphic hyperchromatic, grade II, x40, H&E. (d) Tumor cells in s100 immunohistochemical study.
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fig4
This is considered to be intermediate if there is a mycoid structure even if the cellularity is low (Figures 4(a)-4(c)). Pathology was reported as an intermediate-grade chondrosarcoma (Figure 4(d)).