My 14 yr old son had his shirt off today. i noticed a protrusion on one side of his sternum. what type of physician should i have evaluate him?

Pediatrician: I would start with your Pediatrician. Teens go through rapid growth changes and this can lead to some uneven bone growth in the ribcage and spinal column. http://emedicine.medscape.com/article/906078-overview#a2

Pediatrician: If your son has no pain and has had no trauma sustained to the area, his pediatrician should be able to determine the cause of the protrusion. If necessary, he/she may order an x-ray of the area. If the problem seems more complicated, a pediatric orthopedic evaluation would be the next step.