accessory bones

(redirected from accessory ossicles)

accessory bones

; accessory ossicles inconstant, independent, well-defined corticated bones occurring in 18-30% of normal feet, arising as separate centres of ossification and persisting as separate entities from adjacent constant bone (Table 1)
Table 1: Accessory bones in the foot
Accessory bone in the footLocation
Os tibiale externum (accessory navicular)Within tibialis posterior tendon, adjacent to proximal part of navicular tuberosity
Os trigonumPosterior margin of talus
Os peroneumWithin peroneus longus tendon, adjacent to inferior lateral border of cuboid/calcaneocuboid joint
Os vesalianumAdjacent to fifth metatarsal base
Os intermetatarseumBetween bases of first and second metatarsals
Os interphalangeusWithin insertion of flexor hallucis longus tendon, adjacent to plantar area of hallux interphalangeal joint
References in periodicals archive ?
Incidence of accessory ossicles and sesamoid bones in the feet: a radiographic study of the Turkish subjects.
Although accessory ossicles and sesamoid bones are generally considered clinically insignificant anatomic variations, they can become symptomatic.
We have reviewed a spectrum of pathology involving accessory ossicles and sesamoid bones.
Accessory ossicles and sesamoid bones of the ankle and foot: Imaging findings, clinical significance and differential diagnosis.
This article reviews a spectrum of accessory ossicle and sesamoid pathology and provides guidelines for the preferred imaging modality for the suspected abnormality.
The os calcaneus secundarius is an accessory ossicle of the anterior facet of the calcaneus, which may be mistaken for a fracture of the anterior process.
These could have been incorporated at the expense of pathologies which are rarely encountered, such as sesamoiditis and accessory ossicles.