Cbs deficiency

Cystathionine beta-synthase deficiency

Deficiency of beta-thionase

Deficiency of methylcysteine synthase

Deficiency of serine sulfhydrase

Homocystinuria due to cbs deficiency

Homocystinuria due to cystathionine beta-synthase deficiency

Homocystinuria with or without response to pyridoxine

Homocystinuria, b6-responsive and nonresponsive types