Mutations in USH1C, CDH23, PCDH15, USH1G, CIB2, WHRN, PDZD7 and MYO7A can cause non-syndromic recessive HL [4,5,6,7,8,9,10,11,12], and the latter is also associated with a dominant form of HL [13]. Here, PCDH15 is linked to Hodgkins lymphoma.