 - Blood pressure BP 150 mmHg systolic and 90 mmHg diastolic; initiation or adjustment of BP medication is permitted prior to registration provided that the average of three BP readings at a visit prior to registration is 15090 mmHg; NOTE: all patients with secretory pheochromocytoma or paraganglioma are REQUIRED to: 1 be evaluated in consultation by a hypertension specialist with specific experience in the management of hypertension in the setting of catecholamine-secreting tumors usually an endocrinologist, nephrologist, or a cardiologist, and in the setting of hormone-associated hypertension receive alpha- and beta-adrenergic blockade for at least 7-14 days prior to initiation of lenvatinib; the hypertension specialist of record for each patient should be committed to closely following the patient during the clinical study with evaluation by said specialist required at cycle 1 and 2 and thereafter on an as needed basis 