Myeloid leukaemia in Scotland.

An examination of Scottish cancer registration data over two five-year periods (1968-72, and 1973-77) shows a rise of about 1 1/2 times in incidence of acute myeloid leukaemia between the two periods. This finding is similar to that reported earlier in Lancashire. The increase has occurred at all ages, in all social classes, and in all parts of the country. Reasons why this increase is partially real are given.