Occipital Dermal Sinus: The Tip of the Iceberg

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Résumé

A 2-year-old girl presented with a congenital occipital lump centered by a tuft of coarse hair with a small orifice ; this had grown and developed a purulent flow over 1 year. She had no neurologic symptoms and no history of fever. Her general practitioner prescribed topical antiseptic and antibiotic, but the lump recurred. An ultrasound scan revealed a subcutaneous fistulous tract communicating with a deeper mass lysing the occipital bone.
Computed tomography and magnetic resonance imaging scans documented a dermal sinus connected to an intradiploic occipital dermoid cyst.The full lesion was resected through a suboccipital approach. The cyst wall was opened, revealing a yellow, smooth and nonhemorrhagic content, composed of sebum and hair follicles. Postoperative course was uneventful, and histopathologic examination confirmed the diagnosis of dermoid cyst.

Mots-clés

Dermal Sinus