Note
MRI results today - no meniscus tear. The kneecap pain is being caused by the chrondocalciunosis (or something like that) meaning that I have calcium deposits that get annoyed. So, growths rather than tears. No surgery, just fight inflammation with anti-inflammatory meds and ice. Avoid squats, lunges and such like, which I already do.
So - good news, and I am going to start - slowly - running.