Fronto-parietal pial extension of a basal cell carcinoma of the scalp - case report.

Basal cell carcinoma is the most common malignant tumor of the skin, and it develops most frequently on the head and neck regions. Although most of these tumors are slow growing and with a limited evolution, the existence of some aggressive variants accompanied by a complete neglect from the patient may occasionally lead to invasion of the face and organs of the head and neck. Even though, intracranial invasion of basal cell carcinoma of the scalp is a rare presentation. We describe here the case of a woman who developed an aggressive and neglected morpheiform basal cell carcinoma (ulcus terebrans), which showed a complete invasion through the skull, but with an apparent self-limitation to the pia mater.