<unk>  is a very rare multisystem X-linked recessive disorder characterized by excessively short telomeres and is considered a severe form of dyskeratosis congenita. Being an X-linked disorder,<unk>  primarily affects males. Patients typically present in early childhood with cerebellar hypoplasia, immunodeficiency, progressive bone marrow failure, and intrauterine growth restriction. The primary cause of death in<unk>  is bone marrow failure, but mortality from cancer and pulmonary fibrosis is also significant.
Hoyeraal–Hreidarsson syndrome
Wallis–Zieff–Goldblatt syndrome
Bogart–Bacall syndrome
Renpenning's syndrome
Arakawa's syndrome II
Young–Simpson syndrome
Michels Caskey syndrome
Havana syndrome