All are TRUE about paroxysmal cold hemoglobinuria (PCH), EXCEPT:
Paroxysmal cold hemoglobinuria is a rare form, occurs mostly in children, triggered by viral infection. Donath Landsteiner antibody binds to red cells only at low temperature, but lysis takes place when the temperature is shifted to 37 celcius. Ref: Harrison's principles of internal medicine, 18th edition; Page 882
It occurs mostly in children
It is self limited
Donath Landsteiner antibody is present
Lysis of blood cells occur only at low temperature