Multicompartmental cerebrospinal fluid dissemination of cerebellar pilocytic astrocytoma at presentation.

A 26-year-old male presented with a rare cerebellar pilocytic astrocytoma with multicompartmental subarachnoid metastases. Cerebrospinal fluid dissemination of low grade astrocytoma at presentation is rare in adults. In the present patient, clinical and neuroradiological follow-up at 4 years, without adjuvant treatment, revealed non progression of tumors. The occurrence of benign dormancy, low grade tumor histology and multifocal involvement of the neuraxis is rare. Close clinical observation is the best approach for management of such a patient. The relevant literature is discussed.