Paroxysmal cold haemoglobinuria and measles.

Abstract
A case of acute paroxysmal cold hemoglobinuria associated with measles is described in a 4-year-old girl. Gross hemoglobinuria began 24 hr. before the measles rash appeared and lasted 11 days, with no obvious deterioration in renal function. No specific therapy was instituted except for blood transfusion and avoidance of cold. 37 days after the beginning of the illness the Donath-Landsteiner antibody could no longer be demonstrated. The Donath-Landsteiner red cell auto-antibody involved appeared to be an IgG globulin having specificity within the P blood group system (anti-P1 and P2 ). The positive direct antiglobulin test obtained was due to subhemolytic amounts of complement absorbed by the sensitized red cells.