Trombocitosis esencial. Comunicación de dos casos Essential thrombocytosis. Report of two cases

Essential thrombocytosis (ET) is a rare, clonal panmyelopathy and one of a group of disorders known as chronic myeloproliferative diseases. ET is associated with sustained megakaryocyte proliferation, and clinically presents hemorrhage or thrombosis with ulcerative or necrotic lesions. We report two male patients aged 54 and 80-years-old, respectively, with ulcerative and necrotic lesions on the skin as the first manifestation of this disease. The platelet count was higher than 1.000.000 mm 3 and the bone marrow aspirate biopsy showed megakaryocytic hyperplasia diagnostic of ET (Dermatol. Argent. 2011; 17(1):57-62).