Hi,

If the tendon is truly lengthened, then it needs to shorten. I have never seen this problem before but to shorten it, you will need to keep your elbow straight and your shoulder held in forward flexion. Your hand will need to be turned out so the thumb is pointing out.

This is pretty radical action of course. I can't even guarantee that the tendon will get shorter. You won't be able to use your arm properly if immobilised so you may develop other shoulder problems.

In other words, can you live with it???