RATIONALE: Studying the genes expressed in samples of tissue from patients with cancer in the laboratory may help doctors learn more about changes that occur in DNA and identify biomarkers related to cancer. It may also help doctors predict how patients will respond to treatment.

PURPOSE: This research study is looking at tissue samples from patients with glioma or other brain tumors.

OBJECTIVES:

Primary

• To better understand the pathophysiology of gliomas and identify molecular markers that may predict prognosis and progression or that could identify new therapeutic approaches.

Secondary

• To compare gene expression profiles, in terms of response to treatment, and attempt to isolate subgroups of patients with objective response to certain types of chemotherapy or radiotherapy.

OUTLINE: This is a multicenter study.

Biological samples are collected from patients at time of surgery for diagnostic and/or treatment purposes.

Inclusion Histologically confirmed glioma of any grade or rare primary brain tumor No urgent situation No known or suspected active infection Must not be deprived of liberty or protected by law Not pregnant or nursing

Exclusion :

No concurrent participation in other trials that require a period of exclusion

Pathophysiology of gliomas and identification of molecular markers that may predict prognosis and progression or that could identify new therapeutic