Identify the rarest form of autoimmune hemolytic anemia, paroxysmal cold hemoglobinuria (PCH), caused by a biphasic autohemolysin (autoanti-P [GLOB1])
Maintain specimen at 37°C until separated from cells
Refrigerated (strict) - 1 week
Ambient - NO
Frozen - NO
Hemolysis
An interpretive report will be provided