Summary
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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El-Bahy, K., Ishak, E. Trichilemmal cyst involving the skull base. Acta Neurochir 146, 1361–1364 (2004). https://doi.org/10.1007/s00701-004-0336-y
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DOI: https://doi.org/10.1007/s00701-004-0336-y