X-ray scalp epilation for tinea capitis (scalp ringworm) treatment was used in 1950-1960. The study of individuals submitted to this therapeutic approach has shown an increase head and neck tumours prevalence, namely thyroid cancer. As we had access to a cohort of individuals submitted to this treatment in the North of Portugal, we searched for the more frequent thyroid tumours mutations (BRAF, NRAS and RET/PTC rearrangement), in a subgroup of individuals from the original cohort that developed these tumours.