Gliomatosis cerebri: report of a case presenting as a focal cerebral mass.

Gliomatosis cerebri (syn. astrocytomatosis cerebri) is a rare diffuse neoplastic condition affecting all parts of the brain. The clinical and pathological features of an unusually diffuse and histologically uniform case of gliomatosis cerebri are presented. Many tumour cells stained positively for glial fibrillary acid protein, confirming the astrocytic derivation of this neoplasm. Differing views on the nature of gliomatosis cerebri are briefly discussed.