Steroid-induced remission in primary malignant lymphoma of the central nervous system.

A case of primary malignant lymphoma of the central nervous system is described in which lesions seen on computed tomography scans disappeared, and clinical remissions occurred with the administration of corticosteroids. The tumor affected the region of the fourth ventricle and parietal and frontal lobes. In our patient, three remissions occurred over a span of 24 months, each in conjunction with corticosteroid administration. This supports other observations that steroids alter the natural history of primary malignant lymphoma of the central nervous system, leading to both radiologic and clinical remissions.