Kate Collins67 said:I have to admit, I don't get why symptoms show up so late if we're talking about a hereditary genetic mutation.
For women, I can wrap my head around it due to menstrual compensation, but even then—if there's no period for the first 12 years, how does ferritin not build up and cause damage by then? And for men presenting in their 40s with low ferritin... if they couldn't raise those levels by age 40 without any blood loss, you’d expect them to stay low for the next 40 years too, unless this mutation somehow caps iron absorption and they're just eating Heferol.
How is this actually explained?
Hemochromatosis doesn't seem to be a straightforward issue.
Beyond the points already mentioned, there is another possible explanation.
We have different genotypes—homozygotes versus heterozygotes—and it seems penetrance and gene expression also play a role in why carriers exhibit such a wide spectrum of lab results.
In heterozygotes, you often see elevated transferrin saturation while ferritin stays within normal limits. Even in homozygotes, who face a much higher risk of iron buildup, some studies suggest that up to 50% of women and 20% of men never experience elevated ferritin.
It appears there may be other genes contributing to these variations in ferritin levels, as noted in the conclusions.
Because of this, many authors argue that transferrin saturation is a more sensitive screening parameter; it takes a significantly larger accumulation of iron to bump up ferritin than it does to raise saturation.
But a legitimate question remains: what is the point of a hemochromatosis diagnosis without elevated ferritin (based, say, on high saturation and genetic proof) when the primary goal of treatment is lowering ferritin?
I don't have the answer to that. I'll defer to vividsailor7, since hemochromatosis falls more under the domain of gastroenterologists.
Regardless, I just wanted to point out that, according to the literature, a diagnosis is possible even without high ferritin.
Then, of course, there is the question regarding this specific case, where serum iron is quite high but ferritin is trending toward the lower end. Is it an error? Did the patient follow instructions for accurate testing (fasting, avoiding vitamin-fortified juices for at least two days, etc.)?
I'm not sure. It's an interesting case, I suppose, and I'm curious to see which direction it goes.