Intestinal Disaccharidase Deficiency, also known as disaccharidase deficiency, is related to sucrase-isomaltase deficiency, congenital and residual stage of open angle glaucoma. An important gene associated with Intestinal Disaccharidase Deficiency is MGAM (Maltase-Glucoamylase), and among its related pathways/superpathways are Proteolysis Putative SUMO-1 pathway and Cell cycle_Chromosome condensation in prometaphase. Related phenotype is Reduced mammosphere formation.