Surgical treatment of symptomatic accessory navicular.

The accessory navicular is a known cause of foot pain. When symptomatic and conservative measures have failed, surgical intervention may be required. Simple excision of the ossicle or the Kidner procedure with transplantation of tibialis posterior tendon to the undersurface of the navicular bone may be done. Eighteen patients with symptomatic accessory navicular were reviewed at the Singapore General Hospital, Department of Orthopaedic Surgery 'O' Unit. All 18 patients had foot pain and restriction of activities. Thirteen noticed a prominence on the medial side of the affected foot and 7 had difficulty with shoe fitting. Nine underwent simple excision of the ossicle while the other 9 had the Kidner procedure done. The average follow-up period was 3.1 years. Both the simple excision and the Kidner procedure were equally successful in relieving symptoms in 15 out of the 18 cases. The Kidner procedure did not confer any particular advantage over simple excision.