Accessory Navicular (Subscribe)  

Not such a normal variant JBR-BTR 2004 87(5)

In Accessory Ossicles and Sesamoid Bones: Spectrum of Pathology and Imaging Evaluation Dr. Kalantari; Dr. Seeger; Dr. Chow; Dr. Motamedi Appl Radiol. 2007;36(10):28-37.

One of the causes of painful flat-foot in adolescents is Accessory Navicular. Accessory as the word implies refers to an "extra" bone known as an "os." The accessory bone or 'os' may be a located within a tendon as is the case with os peroni, or as a separate bone...

Core Curriculum
Objectives
1. Describe the clinical symptoms associated with accessory
2. Discuss imaging studies useful for the evaluation of accessory navicular
3. Discuss treatment of accessory navicular

The accessory navicular is an anatomic variant that occurs in approximately 10% of individuals. It is characterized by an accessory ossification center adjacent to the navicular at the site of the tibialis posterior tendon attachment. It is frequently associated with pes planus and can occasionally be symptomatic.
There are 3 types...

accessory navicular is an accessory ossicle of the foot which is located on the medial side of foot, proximal to the navicular and in continuity with the tibialis posterior tendon;
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Matthew B Dobbs, MD and Tim Walton, RN, BSN Iowa Orthop J. 2004; 24: 84–85.
The accessory navicular bone is one of the most symptomatic bones of the foot. Although it has been reported to be present in various members of the same family, there is a lack of knowledge about...

Surgical Pearls: How To Conquer The Accessory Navicular Bone - By Richard T. Braver, DPM
the Modified Kidner procedure is one of the most reliable operations for reducing arch pain associated with an accessory navicular bone (a.k.a. os tibial externum). You can also use this procedure to treat a prominence at the...

This chapter on normal variations of the pediatric foot discusses accessory navicular. Os trigonum will be discussed at a later date.

The accessory navicular is occasionally the source of pain and local tenderness over the instep. If conservative measures fail, surgical treatment may be required and the results of 62 operations to one or both feet in 47 patients are reported. Twenty-six patients were treated by the Kidner operation, in which...