Primary lymphoma of central nervous system (PCNSL) represents a distinct form of extranodal non-Hodgkin's lymphoma localized to central nervous system. We collected data retrospectively of 20 patients with PCNSL treated at Division of Hematology of UHC Zagreb in the last eight years. A total of 13 patients received high dose methotrexate (4 g/m2) while others received other chemotherapy regimens or radiotherapy only. Complete remission rate was 40% and estimated 2-years actuarial survival was 30%. There were no treatment related deaths or significant severe adverse events. Our results are satisfactory in patients younger than 60 years, especially if treated with high dose methotrexate. Older patients, who represent majority of the patients, have dismal prognosis irrespective of treatment modality.