Image of the Week: Why is this pregnant woman's skin and blood discolored?
This patient has congenital methemoglobinemia. This condition is characterized by increased levels of methemoglobin, a naturally occurring form of hemoglobin that has an impaired ability to bind to oxygen. Patients with methemoglobinemia typically experience life-long cyanosis and symptoms are proportional to the patient's methemoglobin level.
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