Description: The accessory navicular is an extra bone or piece of cartilage located on the inner side of the foot just above the arch and is a congenital condition. Sometimes its has no consequences but problems can arise with a foot or ankle sprain, poorly fitting footwear or certain types of activity. That is when the navicula bone and/or the posterior tibial tendon become aggravated. The condition is often found in children with flat feet and usually occurs in adolescence.

Treatment: Ice packs and rest through immobilisation reduces the inflammation. We may prescribe anti-inflammatory drugs or orthoses to support the arch. Physiotherapy and a regime of exercises are helpful in preventing re-occurrence. In persistent cases, surgery may be advised to remove the unnecessary bone altogether.