Fig. 17
From: Radiolucent lesions of the mandible: a pattern-based approach to diagnosis
Intracystic carcinoma. a Sagittal oblique and b axial CBCT image displaying the characteristic aspect of a dentigerous cyst with well-defined cyst borders (arrows). The cyst surrounds the crown of an impacted tooth. c T2-weighted image: solid intracystic component with moderately high signal intensity (arrows). Fluid with high signal intensity within the cyst (dashed arrow). Oedema in the masseter muscle (asterisk). d ADC map with low ADC values (circle) of solid parts (ADC = 0.89 × 10−3 mm2/s) suggesting an intracystic malignant tumour despite the benign appearance on CBCT. Histology revealed SCC arising within a dentigerous cyst