Ependymomas: a clinical and pathologic study. Part I. Biologic features.

A series of 102 Oxford ependymomas was analyzed by comparing certain clinical data with pathologic data obtained by a review of the histologic slides of the tumors. All the data analysis was performed by computer, thus permitting a rapid search of many parameters for relationships of statistical significance. Age and site were found to be associated with the duration of pre-operative symptoms, mitotic index, tumor cell number, and some specific histologic features.