Intradiploic epidermoid
- An incidental lesion in the left occipital lobe had a narrow zone of transition on CT, low values on ADC and did not enhance on post-gadolinium imaging.
- 50-year-old patient with neck pain had a lesion identified on a plain radiograph.
- A large lesion centred on the left occiptial bone projected into the posterior fossa. The smooth margins, "dirty" FLAIR signal, and diffusion-restriction are indicate an epidermoid cyst.