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The presence of methemoglobin in the blood, resulting in cyanosis. A small amount of methemoglobin is present in the blood normally, but injury or toxic agents convert a larger proportion of hemoglobin into methemoglobin, which does not function reversibly as an oxygen carrier. Methemoglobinemia may be due to a defect in the enzyme NADH methemoglobin reductase (an autosomal recessive trait) or to an abnormality in hemoglobin M (an autosomal dominant trait). (Dorland, 27th ed) CID10 - Classificação Internacional de Doenças DeCS Português DeCS Inglês DeCS Espanhol DeCS Espanha DeCS Português com escopo DeCS Inglês com escopo DeCS Espanhol com escopo DeCS Espanha com escopo LILACS - LILACS Regional
DeCS Categories C15 Hemic and Lymphatic Diseases . C15.378 Hematologic Diseases . C15.378.619 Methemoglobinemia . C23 Pathological Conditions, Signs and Symptoms . C23.888 Signs and Symptoms . C23.888.248 Cyanosis . D12 Amino Acids, Peptides, and Proteins . D12.776 Proteins . D12.776.124 Blood Proteins . D12.776.124.400 Hemoglobins . D12.776.124.400.405 Hemoglobin A . D12.776.124.400.463 Hemoglobins, Abnormal . D12.776.124.400.463.510 Hemoglobin M . D12.776.124.400.599 Methemoglobin . D12.776.422 Hemeproteins . D12.776.422.316 Globins . D12.776.422.316.762 Hemoglobins . D12.776.422.316.762.380 Hemoglobin A . D12.776.422.316.762.426 Hemoglobins, Abnormal . D12.776.422.316.762.426.510 Hemoglobin M . D12.776.422.316.762.571 Methemoglobin .		Terms  Synonyms & Historicals Documents LILACS e MDL   Methemoglobinemia . Methemoglobinemias . The presence of methemoglobin in the blood, resulting in cyanosis. A small amount of methemoglobin is present in the blood normally, but injury or toxic agents convert a larger proportion of hemoglobin into methemoglobin, which does not function reversibly as an oxygen carrier. Methemoglobinemia may be due to a defect in the enzyme NADH methemoglobin reductase (an autosomal recessive trait) or to an abnormality in hemoglobin M (an autosomal dominant trait). (Dorland, 27th ed) . 1.00 62 2465   Methemoglobin . Ferrihemoglobin . 0.63 22 3490   Cyanosis . Cyanoses . A bluish or purplish discoloration of the skin and mucous membranes due to an increase in the amount of deoxygenated hemoglobin in the blood or a structural defect in the hemoglobin molecule. . 0.58   Hemoglobins . Eryhem . Ferrous Hemoglobin . Hemoglobin . Hemoglobin, Ferrous . The oxygen-carrying proteins of ERYTHROCYTES. They are found in all vertebrates and some invertebrates. The number of globin subunits in the hemoglobin quaternary structure differs between species. Structures range from monomeric to a variety of multimeric arrangements. . 0.53 769 58519   Hemoglobin A . Normal adult human hemoglobin. The globin moiety consists of two alpha and two beta chains. . 0.53 62 3144   Hemoglobin M . A group of abnormal hemoglobins in which amino acid substitutions take place in either the alpha or beta chains but near the heme iron. This results in facilitated oxidation of the hemoglobin to yield excess methemoglobin which leads to cyanosis. . 0.52 2 125