Whole brain radiation therapy for primary central nervous system marginal zone lymphoma: a case report.

A standard radiation therapy protocol for primary central nervous system marginal zone lymphoma (CNS-MZL) has not been established. The International Lymphoma Radiation Oncology Group suggested a radiation therapy dose of 30-36 Gy for lesions of well-defined CNS-MZL. We report a case of relatively low-dose whole brain radiation therapy (WBRT) for ill-defined CNS-MZL.