I have 2 cm tear in peroneus brevis tendon (mri). have tried resting (boot) and pt. still painful to exercise, not all the time. is surgery needed?

It depends: You have to go over the exact anatomy of the injury that you suffered with your surgeon. I don't know where you live but in genetral you try to find the MOST experienced ankle surgeon that you can find and ask how many of these procedures has he done before. If you are from NYC go to Hospital for Special Surgery. Good luck. Do some research on the net.

Well, it sounds like: you received an accurate diagnosis with an MRI. Your initial therapy was appropriate: rest, immobilization, and physical therapy. This approach is expected to be effective, if it is going to be, within 6-8 weeks. It is a good sign that some of the time you are able to exercise without pain. Continue working with your Podiatrist/Orthopedic Surgeon. Surgery may be your next best option. Good wishes.

Depends : There are a lot of things that are considered before surgery is recommended for perineal tendon tears. One such consideration is if ankle sprains are frequent and happen on level or uneven Bryan's if there is malalignment of hind foot.