For instance, X-linked recessive DC has been linked to mutations in DKC1, autosomal dominant DC to TERT, hTR, RTEL1 and TIN2, and autosomal recessive DC to TERT, RTEL1, CTC1, NOP10, NHP2 and WRAP53/TCAB1 (11–14). The gene discussed is RTEL1; the disease is dyskeratosis congenita.