Splenomegaly is least likely associated with aEUR'

Primary thrombocytosis The question is about the differential diagnosis of myeloprohferative syndrome. - Myeloproliferative disorders are characterized by splenomegaly except for essential thrombocytosis. In Essential thrombocytosis - "Physical examination is generally unremarkable except occasionally for mild splenomegaly. Massive splenomegaly is more indicative of another myeloproliferative disorder in paicular polvcythetnia vera, idiopathic mvelofibrosis and chronic myeloid leukemia".