Finasteride treatment and male breast cancer: a register-based cohort study in four Nordic countries

A potential link has been suggested between dispensed finasteride and increased risk of male breast cancer ( MBC ). Due to the rare occurrence of MBC , it remains to be established if such a relationship exists. The purpose of this study was to combine nationwide registers in four countries to assess the potential association between dispensed finasteride and MBC . A cohort of all males with dispensed finasteride in Denmark, Finland, Norway, and...