Case of the Week
Section Editors: Matylda Machnowska1 and Anvita Pauranik2
1University of Toronto, Toronto, Ontario, Canada
2BC Children's Hospital, University of British Columbia, Vancouver, British Columbia, Canada
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March 29, 2010
"White" Dermoid
- Intracranial dermoids are rare congenital lesions.
- Dermoids contain skin adnexal structures (hair follicles, sebaceous and sweat glands).
- Typically they show low-density mass CT.
- CT Hyperdense dermoids are extremely rare. Dense appearance may be explained by a combination of high protein concentration, intralesional hemorrhage or saponification of lipid or keratinized debris with secondary microcalcification in suspension.
- All of the reported CT hyperattenuating dermoids have occurred in the posterior fossa with no lesions ever having been identified supratentorially.
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