Donath Landsteiner is seen in -
Paroxysmalcoldhaemoglobinuria (PCH). In PCH, the cold antibody is an IgG antibody (Donath-Landsteiner antibody) which is directed against P blood group antigen and brings about complement-mediated haemolysis. Attacks of PCH are precipitated by exposure to cold. PCH is uncommon and may be seen in association with teiary syphilis or as a complication of ceain infections such as Mycoplasma pneumonia, flu, measles and mumps HARSH MOHAN Textbook of pathology 6th edition pg no 313
PNH
Waldenstrom's macroglobulinemia
Paroxysmal cold hemoglobinuria
Malaria
Urinary tract