| decline in the frequency of burkitt's lymphoma relative to other childhood malignancies in ibadan, nigeria. | burkitt's lymphoma is the commonest childhood malignancy in tropical africa and the predisposing factors include malaria and infection with the epstein-barr virus. recent studies suggest that the prevalence of this neoplasm is declining in this environment. the present study was undertaken to investigate whether there is a real decrease in the occurrence of burkitt's lymphoma. we analysed 665 cases of childhood malignancies reported in the ibadan cancer registry between 1991 and 1999. burkitt's ... | 2002 | 12070951 |