Vitamin B12-Responsive Methylmalonic Acidemia, also known as vitamin b12-responsive methylmalonic aciduria, is related to methylmalonic aciduria, cbla type and methylmalonic acidemia. An important gene associated with Vitamin B12-Responsive Methylmalonic Acidemia is MMAA (Metabolism Of Cobalamin Associated A), and among its related pathways/superpathways are Metabolism of water-soluble vitamins and cofactors and Diseases of glycosylation. Affiliated tissues include kidney, and related phenotypes are failure to thrive and nausea and vomiting