Duration: Screening visit (3-4 hrs), pre-treatment imaging visit of [F-18]RGD-K5 PET/CT (~ 3-4 hrs) and the standard [F-18]FDG PET/CT (~ 3-4 hrs) or diagnostic CT, followed by two [F-18]RGD-K5 PET/CT scans, one after the second but before the third Avastin® treatment, and one after the fourth but before the fifth Avastin® treatment, and a follow up standard [F-18]FDG PET (~ 3-4 hrs) or diagnostic CT.