Foreign body giant cell reaction associated with epidermoid tumor: CT and MR findings

J Comput Assist Tomogr. 1995 Jul-Aug;19(4):628-30. doi: 10.1097/00004728-199507000-00024.


A patient with a known epidermoid tumor presented with a new large ring-enhancing mass adjacent to the cyst. Histopathology showed foreign body giant cell reaction adjacent to the epidermoid cyst. The CT and MR imaging appearances are described. The neuroimaging findings are identical to malignant degeneration to squamous cell carcinoma.

Publication types

  • Case Reports

MeSH terms

  • Aged
  • Brain / pathology
  • Cerebellar Diseases / diagnosis
  • Cerebellar Diseases / pathology
  • Cerebellopontine Angle*
  • Epidermal Cyst / diagnosis*
  • Epidermal Cyst / pathology
  • Foreign-Body Reaction / diagnosis*
  • Foreign-Body Reaction / etiology
  • Foreign-Body Reaction / pathology
  • Humans
  • Magnetic Resonance Imaging
  • Male
  • Tomography, X-Ray Computed