This phase II trial studies how well intensive blood pressure management works in decreasing systolic blood pressure in patients with kidney or thyroid cancer that has spread to other places in the body (metastatic) who are starting anti-angiogenic tyrosine kinase inhibitor cancer therapy. This study is being done to find out if a systolic blood pressure to a target of less than 120 mmHg (intensive systolic blood pressure management) can be achieved, well tolerated, and beneficial as compared to the usual approach to a target of less than 140 mmHg while taking an anti-angiogenic tyrosine kinase inhibitor. This study may help doctors understand the best way to control blood pressure in kidney or thyroid cancer patients taking anti-angiogenic tyrosine kinase inhibitor.

You may be eligible for this study if you meet the following criteria:

• Conditions: advanced metastatic renal cell cancer,medullary thyroid cancer
• Age: 18 years - 99 years
• Gender: All