I have been recently studying the topic extensivly cuz i am in a proces
of getting a diagnosis... I had my karyotype done, it came XY and was
covered by isurance.
Only chromosome abnormality that can go (presumably) go unnoticed in
my oppinion is Klinefelter's syndrome XXY, because all other abnormalities
include some delay in both physical and mental development and therefore,
if you had normal puberty and no major mental issues it is not likely to have
unusual karyotype.
But beeing intersex isn't smthing that can be determined by karyotype only.
If it is just karyotype than it is the "easy" case to handle, but in other cases
when it's normal, and other stuff indicate some disorder, than it is the difficult
case.
I was recetly diagnosed with testicular tumor, and had it removed; it all went
well. But pathological analysis found "
estrogen producing tissue" (as they
have labeled it) in the removed testicle. So even though karyotype is normal
smt is certanly wrong and I am really having though time finding out what; at
first findig qualified doctor to take care of my specific situation.
I hope my experience helps somehow....