Brain scanning in oligodendrogliomas: a detailed neuropathology-scan correlation of 34 histologically verified cases.

Thirty-six brain scans and biopsies from 34 patients with histologically verified oligodendrogliomas were evaluated. Twenty-nine of the 36 scans were positive (80.6%) but the abnormal uptake produced by these neoplasms had no distinguishing features. The levels of endothelial proliferation-vascularity, necrosis, and mitoses were significantly different between the positive and negative scans. In the oligodendrogliomas, the relationship between histologic malignancy, detectability on scan, and prognosis remains unresolved.