All are examples of malignant disorders causing myelofibrosis except ?: (A) Chronic myelogenous leukemia, (B) Hairy cell leukemia, (C) Hodgkin's disease, (D) PNH
Answer is D. 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.