Some patients are born with an extra bone in their foot, known as an accessory navicular bone, which may become enlarged or injured and cause irritation or pain, especially when walking or playing sports. While treatment is not needed for an accessory navicular bone that does not cause pain, those that do may require treatment.
The Kidner procedure is the most common surgical treatment for accessory navicular bones that cause pain. This procedure involves detaching the bone from the posterior tibial tendon and then removing it entirely from the foot. The tibial tendon is then reattached and the incision is closed with stitches. Patients will likely need to use crutches after surgery and should be able to resume all physical activity after six weeks.