Dyskeratosis Congenita, Autosomal Recessive 5, also known as dyskeratosis congenita, autosomal dominant 4, is related to dyskeratosis congenita, autosomal dominant 1 and dyskeratosis congenita and related telomere biology disorders. An important gene associated with Dyskeratosis Congenita, Autosomal Recessive 5 is RTEL1 (Regulator Of Telomere Elongation Helicase 1). Affiliated tissues include bone marrow and bone, and related phenotypes are global developmental delay and cerebellar hypoplasia