Article Figures & Data
Figures
- Fig 1.
An inhomogeneous solid echoic mass within the submental area, slightly more prominent on the left side.
- Fig 2.
A, Contrast-enhanced axial CT scan at the level of hyoid bone revealed a well- defined mixed attenuation mass that has expanded to the left lesser cornu and has replaced the normal body of the hyoid bone with peripheral rim calcification and internal chondroid calcification. The right lesser cornu cannot be demonstrated.
B, Contrast-enhanced coronal CT scan revealed a round well-defined inhomogeneous attenuation mass with peripheral rim calcification and internal chondroid calcification below the floor of the mouth.
- Fig 3.
A, The surgical specimen revealed a well-defined, almost-round mass originated from the body, both lesser cornua of the hyoid bone, more prominent on the left side The appearance was concordant with the CT finding.
B, The cut surface of the resected specimen revealed an encapsulated firm, gray-white tissue tumor measuring 7 cm in diameter.
- Fig 4.
Histopathology revealed grade 1 chondrosarcoma seen as mature chondrocytes with minimal nuclear and cytoplasmic atypia.
Tables
Histological grades of chondrosarcoma28 in correlation with 5-year survival rate29
Grade Histology 5-Year Survival Rate (%) 1 Lesion exhibits a preponderance of small, densely stained nuclei 90 2 Lesion contains areas with moderate-sized nuclei but with a low mitotic rate 81 3 Lesion has large nuclei, with foci of dense cellularity and a high mitotic rate 43
