Research Open access Published: 15 January 2025 BMC Public Health volume 25, Article number: 170 (2025) Cite this article 809 Accesses 1 Citations 49 Altmetric Metrics details AbstractBackgroundWe aim to study the potential association between tattoo ink exposure and development of certain types of cancers in the recently established Danish Twin Tattoo Cohort. Tattoo ink is known to transfer from skin to blood and accumulate in regional lymph nodes. We are concerned that tattoo ink induces infla...