Evidence of seasonality in the diagnosis of monocytic leukaemia in England and Wales is presented, with a maximum diagnosis rate in February/March and a minimum in August/September. Previous published results for monocytic leukaemia are of small sample size yet appear consistent with this finding.
Medical Physics Department, North Staffordshire Royal Infirmary, Princes Road, Hartshill, Stoke-on-Trent, ST4 7LN, UK. jonathan.eatough@nstaffsh.wmids.nhs.uk