accessory ossicles

Ossa
suprasternalia: seltene akzessorische Ossikel oberhalb des Manubrium sterni. (Der Knoten rechts paratracheal gehört zu einer großen Struma.)
Wikipedia • CC BY-SA 4.0
X-ray of the
left wrist, with areas representing where common accessory bones would be, colored by their prevalences, and with representative shapes.
Wikipedia • CC0
X-ray of the
right foot by lateral projection, with shapes representing where common accessory and sesamoid bones would be, colored by their prevalences, and with representative shapes.
Wikipedia • CC0
Os centrale
im Röntgenbild bei einem Kind.
Wikipedia • CC BY-SA 4.0
Os
odontoideum als Zufallsbefund. Kein Trauma in der Vorgeschichte bekannt. CT sagittal rekonstruiert.
Wikipedia • CC BY-SA 3.0
Radiopaedia • CC-by-nc-sa 3.0 • de

Accessory ossicles are secondary ossification centers that remain separate from the adjacent bone. They are usually round or ovoid in shape, occur in typical locations and have well defined smooth cortical margins on all sides.

In most cases, they are congenital in origin, although they may occur as a result of trauma or local degenerative disease .

The significance of accessory ossicles is their potential to mimic avulsion fractures.

Siehe auch:
und weiter: