This claim is TRUE:
The original article was published on the People Magazine website. It got its data from a study by Lund University in Sweden. When you search for “Lymphoma”, “Tattoo”, and “Lund University”, an article on the university’s website appears. The website is officially affiliated with a real university, and the information aligns with that in the People article.
With evidence, I believe that the claim is true, due to the reliability of the source and the original article not altering the data or making outlandish claims.