Understanding Hoyeraal-Hreidarsson Syndrome Hoyeraal-Hreidarsson Syndrome (HHS) is a rare, inherited disorder considered to be a severe variant of Dyskeratosis Congenita. This condition is characterized by multiple system involvements, including bone marrow failure, immunodeficiency, and developmental abnormalities. The DKC1 gene, located on the X chromosome, has been closely associated with this syndrome. Mutations in the DKC1 […]











