An extra rib might be inside you.
Strangely, this rare extra rib, as the diagram shows, actually turns up near the neck.
If you have this body trait, you probably already know about it.
The extra rib is known as a “cervical rib.”
They’re often different sizes, and the large ones can create comfort and mobility problems if they get too big in the wrong place.
This condition affects an estimated 0.2–0.5 percent of the population.