Anyone with early anal cancer have partial response at 3 months

Hi.
I have early T2N0 stage anal canal cancer. At my 3 month scan it has appeared to have shrunk from 2.2 centimeters to 1 centimeter and from on the circumference from 9oclock to 12 oclock to 9 to 10 so about 2/3rds. The pet suv went from 5.9 to noted as faint. The radiologist called it as partial response likely residual tumor. I am of course disappointed as with what was deemed a small early tumor I had hoped (and statistically expected) it would have shown complete response. My question is has anyone had this experience and did it go on to complete response. Also did your drs have any input or advice or insight/opinions as to the prognosis? Thanks for any and all input