Sulfhemoglobinemia

Sulfhemoglobinemia (or sulfhaemoglobinaemia) is a rare condition in which there is excess sulfhemoglobin (SulfHb) in the blood. The pigment is a greenish derivative of hemoglobin which cannot be converted back to normal, functional hemoglobin. It causes cyanosis even at low blood levels.

It is a rare blood condition that occurs when a sulfur atom is incorporated into the hemoglobin molecule. When hydrogen sulfide (H2S) (or sulfide ions) and ferric ions combine in the blood, the blood is incapable of carrying oxygen.

Read more about Sulfhemoglobinemia:  Causes, Prognosis and Treatment, Presentation, Notable Cases