KnowraHomocystinuriaLinked fromLinked fromThe 5 pages that link to Homocystinuria, each with the reason it gives.All 5Broader topic 2Related 2Compared with 1MethionineBroader topic: Defects in methionine-pathway enzymes can cause homocystinuria.HomocysteineBroader topic: Severe elevations can signal an inherited defect in homocysteine metabolism.