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methemoglobin reductase deficiency
Genetics:
- associated with defect in cytochrome-b5 reductase
Clinical manifestations:
- congenital form associated with minimal to moderate cyanosis
- of no serious importance (other than cosmetic)
Laboratory:
- venous blood methemoglobin 10-20% of total hemoglobin
General
genetic disease of the blood/bone marrow