joshcodyalex,
Thanks for the post.
Fabrys disease is associated with mitral regurgitation and aortic stenosis. I'm not familiar with pectus excavatum being a manifestation of Fabrys, but pectus excavatum is also associated with mitral valve prolapse/regurgitation.
As to what the doctor meant by "heart valve connected to his lung", I can't imagine what that means. I suspect that he/she misspoke, or that you misunderstood.
If you liked the doctor and trust him/her, then return to them for a more complete explanation. A lot of people become so upset upon hearing about any problem, that they are unable to process the explanations offered after the initial diagnosis. If you didn't care for the doctor, or are concerned about his/her expertise, then by all means, seek a second opinion.
Best of luck.
They did not offer any explanations on this. my son's ecavatum id deep you can lay a golf ball in it