Metastasizing extraneural tumors along the CSF pathway.

Dissemination of metastases from primarily extraneural tumors with the cerebrospinal fluid (CSF) is rare and most often seen in association with a leptomeningeal involvement. Here we present 2 cases of bronchogenic and 1 case of prostata carcinoma with multiple CSF metastases within the entire cerebral ventricles and the spinal canal.