Trichoepithelioma, Multiple Familial, 1, also known as epithelioma adenoides cysticum of brooke, is related to brooke-spiegler syndrome and cylindromatosis, familial. An important gene associated with Trichoepithelioma, Multiple Familial, 1 is CYLD (CYLD Lysine 63 Deubiquitinase). Affiliated tissues include skin, and related phenotype is basal cell carcinoma.