Fig. 2. Positron emission tomography scans showing response to all-trans retinoic acid (ATRA) with arsenic trioxide therapy: left axillary lymph node mass before (A) and after therapy (B), hematoxylin and eosinophil (H&E) staining of axillary lymph node showing follicular lymphoma (C, ×100), immunohistochemistry showing positive Bcl2 staining (D, ×100), bone marrow showing acute promyelocytic leukemia cells with multiple auer rods (E, ×1,000).

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