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Mixed‐type autoimmune hemolytic anemia: differential diagnosis and a critical review of reported cases

BACKGROUND: Autoimmune hemolytic anemia (AIHA) is usually classified as either warm or cold type. During the past few decades, mixed types (Mxs) have also been described in a number of cases (6%‐8% of AIHA), often without serologic data to support the diagnosis. In this study, we demonstrate that the incidence of Mx AIHA in our institution is extremely rare.