My mother is on her third round of folfiri + avastin (we are at the infusion center as of this writing) for the a recurrence in a para-aortic lymph. The onc said that a ct scan could be taken after 4-6 rounds to see if folfiri is working. When we asked exactly how many rounds, the onc said it depends.
For those whose had folfiri and had a ct scan done mid-set (a set = at least 12 rounds of infusion) to check for chemo effectiveness, how many rounds were done before the ct scan?