disease has feature Homocystinuria Methylmalonic acidemia methylmalonic acidemia homocystinuria hereditary anemia methylmalonic aciduria and homocystinuria https://rarediseases.info.nih.gov/diseases/3579/methylmalonic-acidemia-with-homocystinuria https://www.malacards.org/card/methylmalonic_aciduria_and_homocystinuria MONDO:0016826 combined defect in adenosylcobalamin and methylcobalamin synthesis Orphanet:26 methylmalonic acidemia and homocystinemia MESH:C537359 OMIMPS:277400 GARD:0003579 UMLS:C5848324 methylmalonic aciduria with homocystinuria An inborn error of vitamin B12 (cobalamin) metabolism characterized by megaloblastic anemia, lethargy, failure to thrive, developmental delay, intellectual deficit and seizures. There are four complementation classes of cobalamin defects (cblC, cblD, cblF and cblJ) that are responsible for methylmalonic acidemia - homocystinuria (methylmalonic acidemia - homocystinuria cblC, cblD cblF and cblJ). MEDGEN:1864102 homocystinuria without methylmalonic aciduria classic organic aciduria inborn disorder of cobalamin metabolism and transport