Hi Amy,
From reading their website I do have the impression that ISNA takes a more flexible view than some, but I didn't find reference to the three categories you mentioned, "Physical, Chromosomal, and Hormonal." There is a lot of information on the website, and I could easily have overlooked something. Is there a particular place I should look (and I just hope it isn't in big letters on the home page; sometimes those are the hardest to see).
My experience with IS websites to date is that there are two recognized categories, physical and chromosomal. "Hormonal" generally doesn't fit. I don't really find that in itself to be a problem. I don't want to call myself IS if that is not how the word is used. It is more than a little frustrating, however, when I go to talk with doctors and I am not able to find a medically recognized category that I can use. I don't need need the validation of belonging to a certain category, but I do want to better understand myself so that I can understand my particular health risks. This was all hypothetical until I was dignosed with a rare cancer, but not any longer.
I suspect, without having any way of knowing for sure, that a minority of transsexuals that are physically unusual have been exposed to endocrine disrupters, either from medications (such as DES) or from environmental sources. As such we could be the "canary in the coal mine." When we seek medical help, we run afoul of a specialized, compartmentalized system that doesn't deal well with conditions that they didn't learn about in their textbooks and that cross over between specialties. And the frequent lack of curiosity over seeing something new and unusual is very distressing.
While the problems being seen in wildlife and being attributed to endocrine disrupters are often IS issues, it could be that in humans the issues tend to be identified more as TS, especially by those that don't consider IS to include hormonal-only causes. Some strict definitions of TS tend to exclude those with hormonal abnormalities, although that at least hasn't affected my ability to seek treatment so far. I can easily imagine important scientific evidence being ignored because it doesn't properly fit into either the IS or the TS category!
I obtained a copy of my pathology report today from my cancer surgery. The local lab didn't understand what they were looking at and they sent it out to Stanford University Medical Center, as they often do, for evaluation (while I waited a month to learn the prognosis). The comments (response) start out "Thank you very much for submitting this difficult and interesting case for consultation." Yet I encounter almost no medical curiosity, and no support for trying to see the bigger picture of what happened. My radiation oncologist was curious, but it was because he has a particular hypothesis he is exploring that my case, which he called rare, happens to support. He asked my permission to publish it, making it clear that there would be no direct benefit to me in doing so.
Sometimes I feel like I am just a lab specimen, not even alive, where medical science is concerned. I seem to have to do my own research and dignosis, and gauge the risks myself. Now I will need to take this pathology report, Google the terms that it uses, and search for connections. And while I don't personally know other people in this kind of situation, I know they are out there.
Oh well. I will continue to do as I have been, enjoying what I can of my life (now that I am transitioning), and dealing with the rest as it happens. I do want to thank everyone again for your comments. I have a better idea now of what I need to insist upon from my HMO, once I find an MD that I can work with.