Computed tomographic brain scanning in patients with lymphoma.

A retrospective study of 118 lymphoma patients revealed the computed tomographic brain scan to be sensitive to involvement of the orbit and the brain parenchyma by lymphoma. Brain parenchymal lymphoma was seen only in diffuse histiocytic lymphoma; dural infiltration was less readily detected. Leptomeningeal lymphoma could not be directly demonstrated by the CT scan, even with the use of intravenous contrast medium. Serial CT scans contributed to patient care by differentiating the sometimes confusing nonlymphomatous brain lesions.