I swatched for this during my last chemotherapy session. Serious knitting started the day I started radiotherapy. An hour there, and hour back, a few minutes in the waiting room, and an odd moment at home - all my time is recorded in stitches. Knitting in the car is much slower than knitting when stationary, though, so much to my disappointment I didn’t quite complete this by the end of radiation treatments. I got the body done, however! I realize my brain was still quite foggy when I started, too, and I did a lot of ripping out at the beginning. And then there was the third piece of the body, when I forgot to change from the smaller needles after the ribbing, and nearly had it completed when I realized my error…Oh! The tragedy! Nonetheless, the whole exercise - knitting and cancer treatment, both - is just about persisting, and I did. I’ve also rationalized the extended time-scale for completion: radiotherapy (as I have been warned again and again by the nurses) continues to work for 7-10 days after treatment has ended. So if I can finish the sleeves by then….