If a mutation caused it, it's possible.
Around 1 in 500 (0.2%) people have a cervical rib (extra rib or neck rib). It is more rare to have two cerical ribs.
The latest research shows that 1 in about 200 people have an extra rib. The preponderance is in females.
One in twenty people have an extra rib.
The second rib is classified as an atypical rib because it does not follow the typical rib anatomy pattern. It has a longer and more curved body compared to other ribs, with a prominent angle where it articulates with the sternum. These differences make the second rib distinct from the other ribs in the rib cage.
Your neck does not contain any ribs.
Condoms?
Rib vaults are groin vaults with extra stone ribbing.
Neck...as in cervical rib, meaning an extra rib arising from the neck. It may also refer to the narrow part of the uterus (its "neck"), as in cervical mucus, cervical cancer, etc.
I believe that in the first year of production, 1912, you could order as an extra what Winchester refered to as a matted rib. What Winchester meant by this I'm not sure as 1913 is generally given as the first year for a raised matted rib. In 1919 Winchester received a patent for a ventilated rib, they probably did not show up on gun until 1920 though.
The term "Gorilla rib" is used to describe a Lumbar rib. Most humans only have ribs bilaterally attached to their 12 thoracic vertebra but a number of variations exist with cervical ribs, lumbar ribs and even so called sacral ribs. Approximately 8% of humans have a extra rib attached to their lumbar vertebra which also occurs in some types of gorillas
You would die---This quote from this UK government health website would suggest that abnormalities like extra vertebrae and ribs don't cause major health problems."Roughly 10-15% of people have a genetic spinal abnormality and an extralumbarvertebrae (L6) is the most common of these abnormalities.""About 1 in 200 people are born with an extra ribcalled a cervical rib".So there you have it. At least one person you have met recently is likely to already have an extra rib. Human bodies are highly adaptive and only serious malformations and abnormalities cause serious issues.This information would suggest that an extra rib isn't life threatening.
Cervical ribs are extra ribs that grow closest to the neck. They occur in between one in 200 and one in 500 people. Most people will never know they have one, and will have no symptoms. A few people will have symptoms related to thoracic outlet syndrome; this pain or numbness in the arm happens when blood vessels or nerves are compressed by the extra rib.