This is one of the most common problems in young ballerinas. If they are unlucky enough to develop this bone in the back of their ankles (starts forming around 8-9 and fully formed 14 or so years old), this could give chronic pain in the back of the ankle as pointe work is being accelerated.
The goal with this patient will be to calm down all the inflammation, rest the ankle for a total of 3 months removable weight bearing cast, then 2-6 week attempt at weaning out of the cast with an ASO ankle brace maintaining a pain free environment, build up the walking up to 60 minutes then a walk/run program. She is to avoid pointing the ankle, such as sitting back on the foot while kneeling. The sensitivity in the back of the ankle could take 2-5 years, but many patients can avoid surgery and return to full activities over a 6 month period. I have considered, but not used, a bone stimulator for this problem, but it is not contra-indicated. As with any fracture, diet counseling on Vit D, calcium, and also bone density history should be done so that the patient has the best chance of healing.