Tomorrow at 11 am I will have surgery for a Basel Cell skin cancer on my forhead. The surgery is the Mhos surgery, in which the skin cancer is removed in layers and each layer is inspected under a microscope. Layers are taken until the inspection shows no trace of the cancer. Depending on how many layers are needed tomorrow, the surgery could last from 1-4 or more hours. Most of the time is waiting while the inspection is performed, and the surgery isn't very stressful. About four years ago, I had 10 skin cancers removed this way, over a six-month period.
I may not run for a few days, depending on how my energy level holds up.