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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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...

Navicular joins in front with medial, intermediate, & lateral cuneiform bones, which articulate anteriorly with first, second, and third metatarsals;
- navicular provides insertion for tibialis posterior;
- blood supply to the navicular bone is radial and extraarticular & is subject to loss both at time of injury & at time of surgical...

Authors Ameres et al 2005
Contents - Introduction; Clinical; Differentials; Workup; Treatment; Medication; Follow-up; Miscellaneous; Multimedia; References
The navicular plays an important role in maintaining the medial longitudinal arch of the foot. Commonly, fractures of the navicular are not evident on plain radiographs. This often leads to a delay in diagnosis, which...

Wheeless' Textbook of Orthopaedics
Discussion: - self limiting avasulcar necrosis of the navicular; - usually unilateral and affects children, most often boys; - onset is at age 4 in boys and age 5 in girls; - navicular is...

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...

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...

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

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...

Korean J Radiology 2004: 5; 274 Choi et al
The MR imaging findings are a persistent edema pattern in the accessory navicular bone and within the synchondrosis indicating osteonecrosis, inflammation and destruction of the cartilage cap. Posterior tibial tendon dysfunction was clinically evident in most patients.

scaphoid (navicular) fracture

KÖHLER'S DISEASE OF THE TARSAL NAVICULAR Case Presentation -a 3 year old girl who presented to the Orthopaedic Clinic with a complaint of left foot pain exacerbated by bearing weight. Four weeks prior to this visit, the patient's 4 year old sister had jumped onto her left foot during play...

Ramachandran KR, Sasidharan K, Kusumakumary P, Ittiyavirah AK, Krishnakumar AS. Osteochondritis of the tarsal navicular bone (kohler's disease) occurring in a child with acute lymphoblastic leukemia. Indian J Radiol Imaging 1999;9:153-154
Osteochondritis is a disease of one or more epiphyses beginning as a necrosis followed by healing. Osteonecrosis is commonly encountered...

From the OTA Fracture and Dislocation Compendium

Congenital vertical talus (CVT) is an uncommon disorder of the foot, manifested as a rigid rocker-bottom flatfoot. Its characteristic radiographic feature is a dorsal dislocation of the navicular on the talus. If left untreated, CVT results in a painful and rigid flatfoot with weak push-off power. CVT has been referred...

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.

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

Xray Illustration of a case and 10 references (to 1995)

Wheeless' Textbook of Orthopaedics

The differential diagnoses of a limp in a child are broad. Normal age-related gait must first be differentiated from gait impairment. Once gait impairment is identified, differential diagnoses are narrowed as the history and physical examination findings begin to suggest a source for the limp. In many instances, a diagnosis...

Discussion:
- injuries to cuboid may be accompanied by impaction with loss of bone stock;
Associated Injuries:
- navicular tuberosity fracture:
- Lisfranc fracture:
- midfoot/forefoot fractures:
- midtarsal injuries:
Wheeless' Textbook of Orthopaedics

degeneration followed by reossification of one or more ossification centers in children Legg-Calve-Perthes disease (capital femoral epiphysis) Kohler disease (tarsal navicular) Osgood-Schlatter disease (tibial tuberosity) Scheuermann disease (vertebral ring epiphyses) Freiberg infraction (metatarsal head) Sever disease (apophysis of os calcis) osteochondritis dissecans

Dysplasia epiphysealis hemimelica (DEH), or Trevor disease, is a rare developmental disorder affecting the epiphyses in young children. The first report of DEH in the literature was by Mouchet and Belt in 1926, who described the condition as a tarsal bone disorder and used the term tarsomegalie. In 1950, Trevor...

Authors McStay et al 2006
Synonyms and related keywords: hindfoot, talus, calcaneus, midfoot, navicular, cuboid, cuneiforms, forefoot, metatarsals, phalanges, subtalar joint, foot dislocation, dislocation foot
Dislocations of the foot are uncommon but potentially incapacitating injuries. The mechanism of injury may vary from a simple fall to a major motor vehicle collision (MVC)....