Dermoid and epidermoid tumors
Epidermoid and dermoid cysts arise from ectopic ectodermal cells that are retained within the neural groove during early gestation. These tumors have varying presentations that depend on location of the mass. Symptoms range from isolated cranial neuropathy to aseptic meningitis after cyst rupture. The MRI characteristics are usually diagnostic, but 5% have atypical appearance. With complete resection, recurrence is atypical.
Nov. 03, 2020