Oligodendrogliomas are neuroepithelial neoplasms that originate from oligodendrocytes. These tumors account for 4% to 7% of all primary brain tumors and are most supratentorial. The purpose of this study was to evaluate the findings of computed tomography and magnetic resonance imaging examinations of patients with oligodendrogliomas and correlate these findings with clinical and pathological data. Oligodendrogliomas may be pure or mixed, present astrocytic elements and vary from well differentiated to anaplastic. The most common finding observed was a lesion that appeared hypodense on CT or had low-intensity signal on T1-weighted and high-intensity signal on T2-weighted magnetic resonance images. Cystic elements, mild surrounding edema and calcifications (usually coarse) in 2/3 of the cases were also observed. Tumor enhancement was generally mild and was observed in 80% of the cases.
Oligodendrogliomas; Computed tomography; Magnetic resonance imaging; Anatomopathology
