Fig. 10.

An epidermoid cyst has been confirmed on pathological anatomy in a 55-year-old female. (A) Axial head CT image in the soft tissue window with expansile soft tissue mass in the skull vault. The lesion is the intradiploic location with well-demarcated lysis expanding both the inner and outer tables of the skull and well-defined borders. (B) Sagittal oblique CT 3D reformat image shows scalloped bone margin. (C) Axial non-contrast T1W image shows the lesion with a decreased signal. (D–F) Axial T2W, Flair and T2 Gradient images show the mass with an increased signal. (G–H) DWI shows evidence of restricted diffusion along with the ADC map.