Table 1 Characteristic features of the different Burkitt lymphoma subtypes
EndemicSporadicHIV-associated
DistributionEquatorial belt of Africa and Papua New GuineaWorldwideWorldwide
EBV association98%5−10%30−40%
Co-factorsEBV, malaria infectionHIV infection
Incidence5–10/100 0000.01/100 000Variable
MYC breakpointOften >1 kb upstream from 1st coding exonExon 1/intron 1 of MYC geneExon 1/intron 1 of MYC gene
Ig breakpointJoining (J) region, switch (S)μ in some casesSμ, Sα or J regionSμ region
Progenitor cellGC, late GC or memory B cellGC B cellGC, late GC or memory B cell
Frequent site of occurrenceMost frequently jaw. Abdomen, kidneys and ovaries may also be involvedMost frequently abdomen. Kidneys, bone marrow and ovaries may also be involvedLymph nodes, abdomen, bone marrow, CNS