Focal epithelial hyperplasia has been associated with leukocyte adhesion deficiency 84, the human leukocyte antigen (HLA)‐DRB1*0404 allele 85, and recently also with mutations in adjacent transmembrane channel‐like protein (TMC) TMC6 or TMC8 (also called EVER1 and EVER2) genes located on chromosome 17q25 86. Here, TMC6 is linked to leukocyte adhesion deficiency.