Sandbox:Sahar

Cyanosis

Central cyanosis

Peripheral cyanosis

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Causes: ❑ Cold exposure ❑ Acrocyanosis ❑ Erythrocyanosis ❑ Raynaud's phenomenon ❑ Raynaud's disease ❑ Arterial obstruction: ❑ Peripheral vascular disease ❑ Buergers disease ❑ Venous obstruction: ❑ Thromboembolism ❑ Deep vein thrombosis ❑ Superior vena cava syndrome ❑ Decreased cardiac output: ❑ Left sided heart failure ❑ Shock ❑ Hypovolemia ❑ Redistribution of blood flow from extremities

Pseudocyanosis

Metals

Extensive tattoos

Drugs

Pigmentary lesions

Consumption of dyed food