<prompt> All are TRUE about paroxysmal cold hemoglobinuria PCH, EXCEPT:It occurs mostly in childrenIt is self limitedDonath Landsteiner antibody is presentLysis of blood cells occur only at low temperature  <response>: 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: Harrisons principles of internal medicine, 18th edition; Page 882 