disease responds to cobalamin methylmalonic acidemia vitamin B12-responsive methylmalonic acidemia GARD:0012623 ICD10:E71.1 MONDO:0017214 Orphanet:28 SCTID:69614003 Vitamin B12-responsive methylmalonic acidemia (MA) is an inborn error of vitamin B12 (cobalamin) metabolism characterized by recurrent ketoacidotic comas or transient vomiting, dehydration, hypotonia and intellectual deficit, which responds to vitamin B12. There are three types: cblA, cblB and cblD-variant 2 (cblDv2). adenosylcobalamin deficiency https://rarediseases.info.nih.gov/diseases/12623/vitamin-b12-responsive-methylmalonic-acidemia vitamin B12-responsive methylmalonic aciduria methylmalonic acidemia without homocystinuria inborn disorder of cobalamin metabolism and transport nephropathy secondary to a storage or other metabolic disease