Ive been tested, and I have hemachromatosis. That's what my next MRI is for - to check on my liver.
So far, for me, it's monitoring. Some dietary changes such as cutting back on red meat and high iron vegetables (mostly cut out spinach, which sucks because I've loved spinach my entire life, especially the Greek dish spanikopita).
My blood iron levels fluctuate a lot based upon diet. Ive mostly got it under control, but normal for me is still on the high end of the normal ramge for normal people.
It probably went undiagnosed for a long time because I used to give blood regularly, but had to stop when my work hours changed to be 7am-7pm and could not make it to a facility to donate. Thats when blood tests started ahowing a problem. Not yet to scheduled phlebotemy, but probably the best option if it becomes an issue.