S-Adenosylhomocysteine Hydrolase Deficiency is related to hypermethioninemia with s-adenosylhomocysteine hydrolase deficiency and hypermethioninemia. An important gene associated with S-Adenosylhomocysteine Hydrolase Deficiency is AHCY (Adenosylhomocysteinase). Affiliated tissues include liver and pons, and related phenotypes are elevated hepatic transaminase and hypoalbuminemia