Li-Fraumeni syndrome is a cancer predisposition syndrome caused by pathogenic TP53 germline variants and associated with a high lifelong cancer risk. We analysed the German LFS registry that contains data on 304 individuals. Cancer phenotypes were correlated with variants grouped according to their ability to transactivate target genes in a yeast assay using a traditional (non-functional, partially-functional) and a novel (clusters A, B, C) classification of variants into different …