The Rh Negative Blog

Do you have (an) extra rib(s)?

See also:

Do you have an extra vertebrae?

Here is what it can look like.
cervical rib in humans is an extra rib which arises from the seventh cervical vertebra. Their presence is a congenital abnormality located above the normal first rib. A cervical rib is estimated to occur in 0.2% (1 in 500 people) to 0.5% of the population. People may have a cervical rib on the right, left or both sides.

If you do:

What is your blood type?

How and when did you find out?

Is there anything else unique about you?

More here…