Knee Fracture!
The proposed breast cancer treatment was pretty routine and the prognosis was really good. However, Ann was having issues with her knee after a misstep during a workout so she had an MRI. We had scheduled a cruise to Alaska's Inside Passage for early May and all the docs said "go". We went. The day we hit Juneau (and reliable cell service) Ann got a note that her ortho folks were recommending that she be non-weight-bearing due to a knee fracture and meniscus tear. We tried. I bought crutches from the ship's medical unit and managed to grab the last wheelchair on the ship. We still had a great voyage slightly modified.