Cerebellar astrocytoma in an adult with extensive leptomeningeal spread.

A rare case of a benign cerebellar astrocytoma in an adult is reported. This tumour had an extensive leptomeningeal spread in the cerebellar convexity, basal cisterns and spinal cord. The most unusual and radiologically demonstrated extension was also into the sella and Meckel's cave. The case is discussed and the literature is briefly reviewed.