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(a) Peripheral blood smear showing polychromasia (arrowheads) and occasional spherocytes and microspherocytes (arrows); (b) osmotic gradient ektacytometry in w-AIHA may be normal or compatible with acquired spherocytosis as in this case: showing mildly increased Omin and decreased EImax; (c) autoimmune lymphoproliferative syndromes (ALPS) screening panel positive for 4 out of 4 criteria.
