This seems to be what I have, yet you don't see cases of it too often. Anyone know what sort of abnormal growth can cause this?
With retrognathia I mean the lower jaw not the upper
man this is tough. i dont think you'll find a comprehensive explanation as to why your jaw and face grew the way it did from a specialist. it is helpful to look at pictures when you were younger and see the changes during the duration of key growth periods. but the ship has sailed as far as a complete reversible goes so it might not be worth thinking about.
my guess is something prevented your upper jaw from growing horizontally, if the tongue fails to form the palate then you have a problem. it can lead to many many problems. poor oral posture, hyperactive swallowing, mouth breathing, etc..etc. all issues that disrupt growth.