[Primary malignant melanoma of the leptomeninx -- case report on a diffuse variant].

The clinical findings of a female patient with a solitary diffuse invasion of a malignant melanoma into the leptomeninx are compared to the clinical findings of other cases described in literature. It is obvious that headache is the primary symptom. In the progress of the disease, the following symptoms occur: choked papilla, weakness or loss of vision and later on disturbance of consciousness. A common clinical development is hydrocephalus internus. To confirm the initial diagnosis it is necessary to identify specific pathological cells in the cerebrospinal fluid.