label: paroxysmal cold hemoglobinuria
label_lc: paroxysmal cold hemoglobinuria
description: "Paroxysmal cold hemoglobinuria (PCH) is a very rare subtype of autoimmune hemolytic anemia (AIHA), caused by the presence of cold-reacting autoantibodies in the blood and characterized by the sudden presence of hemoglobinuria, typically after exposure to cold temperatures."