Clinical and demographic characteristics of Burkitt lymphoma patients.

N: number of cases with available data.1St. Jude's staging according to Murphy (ref. 23).2Risk group as classified in the Berlin-Frankfurt-Munster (BFM) 90 protocol, adopted by the Instituto Nacional de Câncer – INCA LNH-98 (Brazil) protocol for the treatment of childhood Non Hodgkin lymphoma (ref. 24).