NCIt synonyms : Langer-Saldino Achondrogenesis; Achondrogenesis, Type II; Hypochondrogenesis;
NCIt definition : An autosomal dominant condition caused by mutation(s) in the COL2A1 gene, encoding
collagen alpha-1(II) chain. It is the most severe of a spectrum of disorders caused
by mutations in the COL2A1 gene, characterized by short limbs, small chest and lungs,
and abnormal ossification of the spine and pelvis. Often, infants die at birth or
shortly thereafter.;