Brooke-Spiegler syndrome is a rare autosomal-dominant genetic disorder characterized by multiple adnexal tumors, including cylindromas, spiradenomas, spiradenocylindromas and trichoepitheliomas. It is caused by germline <i>CYLD</i> mutations commonly leading to a premature stop codon. We here report on 3 novel <i>CYLD</i> mutations in 3 unrelated BSS patients, including the classic phenotype, multiple familial trichoepitheliomas phenotype and malignant transformation. These included c.1821_1826+1delinsCT/L607Ffs*9, c.2666A>T/p.D889V and c.2712delT/p.905Kfs*8. By extending the spectrum of <i>CYLD</i> mutations, better understanding of the molecular mechanisms of BSS can be gained, which might later assist in finding new treatment options.