- Once the MTD is established, 10 additional patients will be enrolled to the expansion phase, at the MTD, and tumor biopsies will be obtained to assess pharmacodynamic endpoints. During cycle 1 of the expansion phase, ganetespib will be administered intravenously weekly, on days 8 and 15 with omission of day 1 treatment to accommodate a baseline biopsy pre-ganetespib but after administration of Ziv-Aflibercept. For all subsequent cycles, ganetespib will be administered days 1, 8, and 15. Ziv-Aflibercept will still be administered intravenously every 2 weeks, on days 1 and 15, of a 28-day cycle.