<prompt> Which is the best treatment for management of malignant pheochromocytoma?Alpha blockersChemotherapyBulk reducing surgeryI131-MIBG  <response>: The first line choice for management of malignant pheochromocytoma is I131- MIBG at monthly intervals over three to six cycles. This is followed by Averbuch Chemotherapy protocol including dacarbazine, cyclophosphamide and vincristine. 