Bumping an old thread... if anyone knows a thread this should be merged into, please PM URLs for all threads to be joined to any Watchman (salem, rtpoe and SwitcherX).
The terms "macromastia, hypertrophy and gigo/amastia" are bandied around pretty loosely, with some gals barely into the D-cup range themselves using such words (or having such words used about them by others for publicity reasons) when of course, they're merely busty, sometimes only even by real-world standards (and not those of our forum, or Score for example). To me (a layperson) it seems a fuzzy line: where busty ends and a medical condition begins.
Of course, there are cases to be seen in both pix and video of what looks like genuine medical examples of extreme breast growth: women larger than Chelsea or Beshine, but not having implants. Some of those cases happen to be m1nors, and can't be posted here.
I will attach a short clip about a "gigomastia" subject from some South American tv show (I think). Everyone depicted is at least 18 from what I've been able to determine. I hope the forum lets me attach it... it's just over 3MB in size.
Added later: I couldn't attach the original file, so edited off the second part (which looked as if it were about a flat-chested woman) and am attaching the edited avi. It seems OK, but my editing program has been sketchy lately, so no promises.