Based on the localization of ARP-T1 to the basal body and its interaction with septin 2, which is involved in ciliary length control24, we analyzed the ciliary structures in the samples from BDCS patients (ACTRT1 547_548insA, mutations B2, mutation A3, mutation CNE12)6 comparing to normal hair follicles and samples from a sporadic BCC patient. Here, ACTRT1 is linked to Bazex-Dupre-Christol syndrome.