Megaloblastic Anemia, also known as imerslund-grasbeck syndrome, is related to congenital intrinsic factor deficiency and imerslund-grasbeck syndrome 2. An important gene associated with Megaloblastic Anemia is CUBN (Cubilin), and among its related pathways/superpathways are Metabolism and Diseases of glycosylation. The drugs Hydroxocobalamin and Cyanocobalamin have been mentioned in the context of this disorder. Affiliated tissues include kidney and skin, and related phenotypes are vitamin b12 deficiency and malabsorption of vitamin b12