If you are in Group 2, you will take 2 dasatinib pills 1 time every day, for 7 days before your already-scheduled biopsy on Day 8 (+/1 business day) of Cycle 1. Within 5 days after the biopsy, you will begin taking 2 dasatinib pills 1 time every day for up to 13 cycles, as long as you tolerate it and the disease does not come back.