M.K.
My brother has that condition and is extremely self-conscious of his bare chest- though now that he has some weight on him it is not so obvious. I don't think anything was ever offered as a remedy (i.e. surgery). He has asthma (diagnosed as an adult), but I don't know if that is related or not. It didn't "get worse" as he grew- It was always just caved in, and still is. He's now 38. (He has no children, so I can't say anything about the heredity aspect, but he is a firefighter and it hasn't affected his physical ability to do that job with all its demands.)