Autoimmune hemolytic anemias are a heterogenous group of disorders as evidenced by the multiple forms and classifications they have been commonly subjected to: acute or chronic, idiopathic or symptomatic, clinically latent or expressed, due to warm or cold autoantibodies. This work attempts to give an overview and synthesis of recent achievements in the knowledge of these syndromes within clinical, immunohematologic and pathophysiologic fields. In contrast, little progress has been made in the therapeutic measures the efficacy of which depends on the same variables as more than a decade ago.