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Temporal Dermoid Cyst with a Partial Dermal Sinus Tract

Published online by Cambridge University Press:  02 December 2014

Joseph A. Shehadi
Affiliation:
Division of Neurosurgery, Montreal General Hospital, McGill University, Montreal, Quebec, Canada
Karen M. Johnston
Affiliation:
Division of Neurosurgery, Montreal General Hospital, McGill University, Montreal, Quebec, Canada
Ibrahim A. Alorainy
Affiliation:
Division of Neuroradiology, Montreal General Hospital, McGill University, Montreal, Quebec, Canada
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Abstract

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Background:

Cranial dermal sinuses are rare and occur most frequently in the posterior fossa and along the midline. Likewise, supratentorial dermoid cysts are very uncommon.

Method:

We report a unique case of an adult female patient with both a supratentorial dermoid cyst and an incomplete dermal sinus tract.

Results:

The patient is a 31-year-old female, who presented with a new onset complex partial seizure. Neuroimaging and surgery revealed a right superior temporal dermoid cyst with an associated dermal sinus tract. Furthermore, the dermal sinus tract was incomplete and had no cutaneous manifestations.

Conclusion:

We present a rare patient with an off midline supratentorial dermoid cyst associated with a uniquely incomplete cranial dermal sinus tract. The dermal sinus tract involved the bone, dura and intradural compartment, without involving the overlying skin. This represents a novel variant in the spectrum of cranial dermal sinus abnormalities.

Résumé

RÉSUMÉIntroduction:

Les sinus dermiques crâniens sont rares et se retrouvent le plus souvent dans la fosse postérieure et sur le plan sagittal. Les kystes dermoïdes supratentoriels sont également très rares.

Méode:

Nous rapportons le cas d’une femme adulte ayant un kyste dermoïde supratentoriel et un sinus dermique incomplet.

Résultats:

Il s’agit d’une femme âgée de 31 ans qui a consulté pour un phénomène récent de crise partielle complexe. La neuroimagerie et la chirurgie ont révélé l’existence d’un kyste dermoïde temporal supérieur droit associé à un sinus dermique. De plus, le sinus dermique était incomplet et ne comportait pas de manifestation cutanée.

Conclusion:

Nous présentons le cas rare d’une patiente présentant un kyste dermoïde supratentoriel non médian associé à un sinus dermique crânien incomplet. Le sinus dermique impliquait l’os, la dure-mère et le compartiment intradural, sans impliquer la peau sus-jacente. Ceci constitue une nouvelle variante dans le spectre des anomalies des sinus dermiques crâniens.

Type
Case Report
Copyright
Copyright © The Canadian Journal of Neurological 1999

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