All are examples of malignant disorders causing myelofibrosis except ?
Chronic myelogenous leukemia
Hairy cell leukemia
Hodgkin's disease
PNH
Disorders Causing Myelofibrosis Acute leukemia (lymphocytic, myelogenous, megakaryocytic) Chronic myelogenous leukemia Hairy cell leukemia Hodgkin's disease Idiopathic myelofibrosis Lymphoma Multiple myeloma Myelodysplasia Polycythemia vera Systemic mastocytosis Ref: Harrison, E-18,P-905.