This condition has been observed in multiple family members and has propensity to occur slightly more in females than males. For most individuals this condition is a non-issue and most people who have them never have a problem with them. Over the years when x-raying patients for other problems I will point out that they have an extra bone in their foot and the usual response from the patient is nothing more than a yawn.Causes
It is commonly believed that the posterior tibial tendon loses its vector of pull to heighten the arch. As the posterior muscle contracts, the tendon is no longer pulling straight up on the navicular but must course around the prominence of bone and first pull medially before pulling upward. In addition, the enlarged bones may irritate and damage the insertional area of the posterior tibial tendon, making it less functional. Therefore, the presence of the accessory navicular bone does contribute to posterior tibial dysfunction.Symptoms
Many people have accessory (?extra?) naviculars (figure 1) - a prominent extra bone extending from the navicular bone. Most accessory naviculars are completely asymptomatic. However, some individuals will develop pain on the inside of their midfoot. Pain may occur from the pressure of the shoe ware against the prominence, irritating either the bone itself or the fibrous junction where the accessory bone meets the regular navicular. Alternatively, the fibrous junction or interface may become painful as a result of tension applied by the posterior tibial tendon through its connection or insertion at that site. Often, individuals will be asymptomatic for years, however, a new pair of shoes or a change in their activity level can cause symptoms. The accessory navicular itself typically develops during adolescence, when the two areas of the navicular bone fail to fuse together.Diagnosis
To diagnose accessory navicular syndrome, medical staff ask about the patient?s activities and symptoms. They will examine the foot for irritation or swelling. Medical staff evaluate the bone structure, muscle, joint motion, and the patient?s gait. X-rays can usually confirm the diagnosis. MRI or other imaging tests may be used to determine any irritation or damage to soft-tissue structures such as tendons or ligaments. Because navicular accessory bone irritation How can you get taller in a week
? lead to bunions, heel spurs and plantar fasciitis, it?s important to seek treatment.Non Surgical Treatment
Most doctors will try to find a non-surgical approach to the issue due to costs and complications involved in a surgery. Some non-surgical procedures are: Immobilization which consists of placing the foot in a cast or walking boot to allow rest and decrease inflammation, placing a towel-covered-icepack on the area to reduce inflammation, anti-inflammatory or steroid drugs/injections may be prescribed to reduce swelling and pain, physical therapy may be used to help strengthen muscles and prevent a reoccurrence of symptoms, Orthotic Devices placed in the shoe to help support the arch and prevent a reoccurrence of symptoms.Surgical Treatment
Once the navicular inflammation has lessened it is not necessary to perform surgery unless the foot becomes progressively flatter or continues to be painful. For these children, surgery can completely correct the problem by removing the accessory navicular bone and tightening up the posterior tibial tendon that attaches to the navicular bone. The strength of this tendon is integral to the success of this surgery as well as the arch of the foot. Following surgery the child is able to begin walking on the foot (in a cast) at approximately two weeks. The cast is worn for an additional four weeks. A small soft ankle support brace is then put into the shoe and worn with activities and exercise for a further two months.