Chocolate cyanosis seen in
Methemoglobinemia Signs and symptoms Headache, nausea, vomiting, breathlessness, confusion, coma, convulsion, severe metabolic acidosis. Hemolysis may occur in G6PD deficiency. Blood is chocolate brown in color (chocolate cyanosis) Ref: FORENSIC MEDICINE AND Toxicology Dr PC IGNATIUS THIRD EDITION PAGE 430
Wilson's disease
Zinc poisoning
Methemoglobinemia
Mercurialentis
Poisoning