has characteristic has characteristic methemoglobinemia anemia hereditary methemoglobinemia https://github.com/monarch-initiative/mondo/issues/9097 https://www.malacards.org/card/hereditary_methemoglobinemia ICD10CM:D74.0 NCIT:C98898 Orphanet:621 UMLS:C0272087 MESH:C580280 GARD:0002659 autosomal recessive methemoglobinemia MONDO:0018963 icd11.foundation:586921197 MEDGEN:473013 SCTID:267550008 Methemoglobinemia inherited in an autosomal recessive pattern. It is caused by deficiency of the enzyme NADH methemoglobin reductase or the presence of abnormal hemoglobin M. It presents with cyanosis early in life. There is no evidence of cardiopulmonary disease present. hereditary methemoglobinemia congenital methemoglobinemia inherited hemoglobinopathy inherited