the epidemiology of leukaemias in africa is discussed briefly , especially as to the rarity of acute lymphoblastic leukaemia under the age of four years , the frequency of chloroma , the young age of presentation of chronic granulocytic leukaemia , the frequency of chronic lymphatic leukaemia in adults , especially women , under 45 years in tropical africa , and the frequency of infection by the human t-cell leukaemia-lymphoma ( or lymphotropic ) virus type i and of adult t-cell leukaemia-lymphoma .
C0009450
infection
C0023493
adult t-cell