In endemic goitre areas 20%of the population over 70 years old will have a retrosternal goitre. The definition of a retrosternal goitre varies with respective authors, there are four major definitions.
I started PT after 10 days and can straighten my leg, bend to a little past 90 degrees and walk without crutches three days before the 3 week post surgery mark.
You can put as much weight on your leg as is comfortable immediately after surgery. Again, the usual need for crutches or a walker is about two or three days. Riding on an exercise bike, using a treadmill or elliptical machine, or just plain walking are all good exercises to begin once the knee is less painful.