SLC26A4 and Hodgkins lymphoma: We found causative variants of the SLC26A4 gene in over 60% of patients, and detailed genotype–phenotype analyses showed a higher incidence of thyroid enlargement/malfunction and earlier and more severe HL in patients with two pathogenic variants located in SLC26A4 (M2) compared to those carrying only one pathogenic variant in the SLC26A4 gene in trans configuration with the CEVA haplotype (M1 + CEVA).