I had X-rays yesterday of my rib cage by my Chiropractor. On the X-rays parts of my rib bones looked like they had been deteriating or had been gnawed on by an animal. I have never knowingly broke, fractured, or had damage to my ribs. My doctor could not tell me what it was or even an option except I was most likely born that way. Is this normal to be born with rib bones like this, even possible. I have had other X-rays and no one has ever mentioned this before. I asked if this could be a problem with the X-ray film and he assured me the film was fine by showing me all the other X-rays he took of me and how they were not showing other bones the same way.