High dependency units may be the answer

disease than with nodal disease.'Although these differences suggest aetiological and biological heterogeneity, the evidence that diabetes has a role in either type of non-Hodgkin's lymphoma, as suggested by the Japanese data, is not strong.A cohort study in 1982 of people with diabetes mellitus found an excess of lymphoma,' but the authors attributed this to inappropriate referent population rates.'They also observed no associa- tion in a cross sectional study.'Further studies will require more accurate determinations of diabetes and nodal status in non-Hodgkin's lymphoma.