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Published on: July 5, 2021
Trichilemmal cyst involving the skull base
1Department of Neurosurgery, Ain Shams University, Cairo, Egypt. Khaledbahy@yahoo.com
Background:
Trichilemmal cyst (TC) a rare tumour originating from the outer root sheath of the hair follicle particularly in the scalp has never been reported to involve the skull base. Here a case of TC extensively involving the skull base is presented. The neuro-imaging, operative, and pathological features are described. Possible histogenesis is also discussed.
Method:
The clinical, radiological, operative, and pathological features of a TC involving the temporal-infratemporal fossae, orbit, paranasal sinuses, and the clivus is described.
Findings:
Multilocular cysts full of keratinized material were found. Histopathological findings were consistent with those for a typical cutaneous TC.
Conclusion:
TC of the variety found in the skin may involve the skull base extensively where it shows the typical histopathological features.
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