Epidermoid diagnostic via imaging
Discussion: There are congenital and acquired epidermoid cysts. Congenital type is a non-neoplastic inclusion of ectoderm during neural tube closure or formation of secondary cerebral vesicles. Acquired type is implanted epidermis, usually by nonstylet needle punctures (as in lumbar puncture). Grossly, it is a well-defined lobulated cystic lesion, which insinuates along CSF cisterns.
