Neuroradiological findings in a child with primary leptomeningeal melanoma.

A case of primary leptomeningeal melanoma in a child is presented. The patient was studied with multiple neuroradiological methods, however computed tomography (CT) provided the most important information. The CT findings with leptomeningeal tumor, although not completely specific, do suggest the diagnosis, thus providing important information to explain the acute onset of symptoms in a previously healthy child. This case also differs from previously reported cases in terms of the type of hydrocephalus associated with the tumor.