1. The records of 57 patients with autoimmune hemolytic anemia have been reviewed to learn if the hematologic data were of any prognostic importance. It appeared that higher mortality was associated with severe anemia, reticulocytopenia, thrombocytopenia and leukopenia. The presence of spherocytosis and erythroblastosis seemed to have no prognostic significance with regard to mortality.

2. Thrombocytopenia in several patients was associated with thromboembolic disease.

3. There was a definite seasonal incidence of hemolytic crises in AHA, more crises occurring during the winter months.

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