Everyone has one navicular bone: one of the small bones of the foot. A small number of people have a second small navicular bone or piece of cartilage located on the inside of the foot just above the arch: both are simply called an "accessary navicular bone." It is located within the posterior tibial tendon which attaches in this area. It is easy to see as a "bump." Most that have it never have pain. If they get pain, we call it: "Accessary navicular bone syndrome."
Causes
Let us see the reasons why the tendon or the bone would get aggravated. Ankle or foot sprain, irritation of the bone caused by footwear, overusing the foot, quite common in athletes and dancers. People born with this extra bone are also known develop flat feet which also adds to the strain on the posterior tibial tendon and lead to the syndrome.
Symptoms
One obvious problem with the accessory navicular is that it may be large and stick out from the inside of the foot. This Can you lose weight by doing yoga? cause it to rub against shoes and so become quite painful. The fibrous connection between the accessory navicular and the navicualar, as well, is easy to injure, also leading to pain. This is kind of like a fracture, and such injuries cause the bone to move around too easily, leading to pain with activity. When the connection between the bones is injured in this way, the two bones do not always heal properly, so pain may continue unabated.
Diagnosis
The diagnosis begins with a complete history and physical examination by your surgeon. Usually the condition is suggested by the history and the tenderness over the area of the navicular. X-rays will usually be required to allow the surgeon see the accessory navicular. Generally no other tests are required.
Non Surgical Treatment
In order to strengthen your muscles to prevent further injury and to provide support to the foot, your podiatrist may also outline a physical therapy routine and prescribe orthotics. Orthotics will provide support to the arch of your foot, although they must be carefully crafted in order to make room for that pesky extra bone you?ve got poking about.
Surgical Treatment
After the anesthesia is administered you will be heavily sedated and placed on your stomach. Surgeons will place a tourniquet around your thigh and an incision will be made on the inside of the foot. The posterior tibial tendon will be moved as necessary and the accessory navicular will be removed. Surgeons will repair the posterior tibial tendon with sutures or suture anchors, and the wound will be closed. A splint will be placed on the foot for stabilization and immobilization. You will be permitted to leave the surgical center once you have been cleared by the anesthesiologist. Plan ahead to have a friend or family member take your prescription to a pharmacy to pick up your post-op medication. Use narcotic pain medications before bed or if numbness in your foot begins to dull. Schedule a post-op visit for 4 weeks after the procedure.
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