[Intracranial spread of a melanoma of the face: the trigeminal pathway]

The intracranial evolution of cutaneous melanoma is usually due to metastases. Neurotropic invasion mainly concerns the trigeminal and the facial nerves. The melanoma is a rare entity among neurotropic tumors.A patient presented with a desmoplastic melanoma of the lower lid, complicated by a perineural extension to the cavernous sinus and the mandibular nerve via the maxillary nerve.This neurotropic evolution should be carefully monitored when close to a nerve. Extensive surgical excision including peripheral nerves in the vicinity of such tumors is recommended. MRI should be performed when a motor or sensitive disorder appears in the course of a desmoplastic melanoma.