<prompt> In pheochromocytoma, not a pa the rule of 10 is10 are bilateral10 are malignant10 are extra adrenal10 are symptomatic  <response>: Ans is d i.e. 10 are symptomatic Pheochromocytomas usually subscribe to a convenient rule of 10 or 10 tumor; i.e. 10 of pheochromocytomas are :-Bilateral Extra-adrenal FamilialMalignant Multiple Occur in children 