Computer tomographic assessment of perifocal edema surrounding tumors of the cerebral cortex

It is well known, that intracranial tumors can induce peritumoral edema of variable extension. Some authors describe a dependency between malignancy of tumor and size of perifocal edema. It is generally accepted that metastases induce the largest perifocal edema. This study investigates the relationship between the volume of the perifocal edema and its distance from the surface of the cortex.