... two.The risk of lung cancer was lower than expected for men ≥70years of age during the first 5 years of follow-up after theirbreast cancer. The observed lower number of lung cancer cases may ... the firstbreast cancer diagnosis were assessed.Results Of the 1,926 male breast cancer cases, 221 (11.5%)developed a second primary cancer. Men with first incidence of breast cancer have a significantly ... factors,the effects of treatment for the first cancer [1,2], hereditary cancer syndromes [3], or even gene-environment interactions.Early age of onset of cancer, family history of disease, bilateraldisease,...