Could you advise the best solution for active osteod osteoma inside the bones of the ankle?

Several solutions. These tumors have been reported to shrink on their own with no surgical intervention over several years. The standard treatment for osteoid osteoma is surgically cutting out of the entire tumor, particularly the central core, for a good outcome. Ct-guided radiofrequency removal of the nidus has been successfully used with few recurrences and little complication.