Fig. 1From: KRAS mutation in secondary malignant histiocytosis arising from low grade follicular lymphomaDiagnostic low grade follicular lymphoma. Excisional biopsy reveals a nodular lymphoid proliferation of small lymphocytes with elongated nuclei (a H&E, 100X; b H&E, 600X). Flow cytometric analysis identifies a surface lambda light chain-restricted B-cell population that is CD10+ and CD5-Back to article page