ICD-11 definition : Classical homocystinuria due to cystathionine beta-synthase (CbS) deficiency is an
autosomal recessively inherited disorder of methionine metabolism characterized by
the multiple involvement of the eye (edtopia lentis), skeleton genu valgum and pes
cavus), central nervous system intellectual deficit, psychiatric illness), and vascular
system (thromboembolism).;
ICD-11 synonym : Homocystinuria due to cystathionine beta-synthase deficiency; CBS - [Cystathionine beta-synthase] deficiency; Cystathionine beta-synthase deficiency; CBS deficiency;
Classical homocystinuria due to cystathionine beta-synthase (CbS) deficiency is an
autosomal recessively inherited disorder of methionine metabolism characterized by
the multiple involvement of the eye (edtopia lentis), skeleton genu valgum and pes
cavus), central nervous system intellectual deficit, psychiatric illness), and vascular
system (thromboembolism).