Excavatum Pectus
I had to look this up to know what its about here is what I found for you,
Pectus excavatum (a Latin term meaning hollowed chest)[1] is the most common congenital deformity of the anterior wall of the chest , in which several ribs and the sternum grow abnormally.
That is from Wikipedia. I've seen this before but did not know the name of it. Its genetic so only if you have a family member with it then it might be passed on.