Abstract
All dermoid cysts arising at the cranial vault had been reported as being located subgaleally, i.e. under the galea aponeurotica or epicranium. We are presenting a case that we believe to be the first case of an intragaleal dermoid cyst ever reported. An eighteen years old girl presented at our consultation for a midline frontal swelling evolving since 2 years. Neurological examination was normal. The Computed Tomography (CT) scan showed a round shaped heterogeneous mass at the vertex with no intracranial extension. The lesion was excised surgically. It appeared to be located intragaleally (within the epicranium) and composed of hairs and liquefied fat evocative of a dermoid cyst. The diagnosis of dermoid cyst was confirmed on histology. Postoperative outcome was excellent and the patient is symptom-free 16 months after surgery.
Highlights
Introduction and BackgroundDermoid cysts known as inclusion cysts are pseudotumors thought to arise from inclusion of ectodermal elements within other tissues during embryologic life or after a trauma [1]-[3]
Dermoid cysts of the head involve the neurocranium as well as the splanchnocranium; they can be intra- or extra-axial in any possible location [1]-[18]. Those involving the cranial vault had been unanimously described as being located under the cranial vault aponeurosis called galea aponeurotica or epicranium
On Computed Tomography (CT) scan, the lesion appeared round shaped with a broad base, heterogeneous with some parts having the same density as brain tissue and others showing hypodensity similar to that of subcutaneous fat or air
Summary
Dermoid cysts known as inclusion cysts are pseudotumors thought to arise from inclusion of ectodermal elements within other tissues during embryologic life or after a trauma [1]-[3] Dermoid cysts of the head involve the neurocranium as well as the splanchnocranium (the face); they can be intra- or extra-axial in any possible location (intracranial, extracanial, intradural, extradural, intradiploic, whitindural sinuses or air sinuses, and so on) [1]-[18]. Those involving the cranial vault had been unanimously described as being located under the cranial vault aponeurosis called galea aponeurotica or epicranium. We are reporting on the first case of an intragaleal dermoid cyst ever described
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