If the gland is no longer there to grow, it can't possibly grow; that's how I understand it. True to say you could put fat on your chest, but as we all know who have tried dieting to well under a healthy weight, the fat goes off your chest, gland remains and can only be got rid off with a scalpel!
Don't know if there are any official studies, but would expect there to be a high correlation of gyne sufferers also having hair loss, as high testosterone levels are the predominant cause of both these problems.
It's very odd that being extra 'manly' results in you going bald and getting boobs - natures way of balancing things up by messing with uour hormone levels is rather cruel!!!