has material basis in germline mutation in disease has feature CBLIF Megaloblastic anemia hereditary intrinsic factor deficiency https://www.malacards.org/card/congenital_intrinsic_factor_deficiency https://www.malacards.org/card/intrinsic_factor_deficiency congenital pernicious anaemia Orphanet:332 congenital pernicious anemia due to defect of intrinsic factor MONDO:0009852 MEDGEN:1876474 SCTID:60504009 MESH:C563242 congenital pernicious anemia MedDRA:10070440 OMIM:261000 UMLS:C2062370 Congenital intrinsic factor deficiency (IFD) is a rare disorder of vitamin B12 (cobalamin) absorption that is characterized by megaloblastic anemia and neurological abnormalities. hereditary juvenile megaloblastic anemia due to intrinsic factor deficiency intrinsic factor, congenital deficiency of SCTID:34925000 IFD congenital pernicious anaemia due to defect of intrinsic factor GARD:0003024 DOID:0050734 hereditary juvenile megaloblastic anaemia due to intrinsic factor deficiency congenital intrinsic factor deficiency gastric intrinsic factor deficiency intrinsic factor deficiency ICD9:281.3 hereditary anemia inborn disorder of cobalamin metabolism and transport