[Morphology and prognosis of intracranial tumors]

Traditionally, prognosis of intracranial tumors is considered to be correlated with histology. Today a four grade scale is increasingly used, in which the grades II through IV are attributed to gliomas depending upon their cellular and tissue pleomorphism. These tumors will regrow after one to five years. Tumors which will not relapse after successful operation are considered to be of grade I. This grading, which is part of the WHO histological typing of intracranial tumors, can be supplemented by the proliferation markers. These may allow better evaluation of the prognosis.