ICD-11 definition : Hoyeraal-Hreidarsson syndrome is a very rare X-linked recessive disorder considered
to be a severe variant of dyskeratosis congenita, characterized by intrauterine growth
retardation, microcephaly, cerebellar hypoplasia, progressive combined immune deficiency
and aplastic anemia.;
Hoyeraal-Hreidarsson syndrome is a very rare X-linked recessive disorder considered
to be a severe variant of dyskeratosis congenita, characterized by intrauterine growth
retardation, microcephaly, cerebellar hypoplasia, progressive combined immune deficiency
and aplastic anemia.