Quite a lot, apparently.
(In response to some question about appearance or a missing experience) "I was born with a birth defect that made people think I was a boy."
"OMG, that's horrible! What was it?"
A rose by any other name would certainly smell as sweet, but if it were called a turdblossom, would it be as popular? Clearly, Juliet did not work in marketing.
Every marketer knows the importance of a name. How appetizing does a Patagonian Toothfish sound? But as Chilean sea bass, it's so popular that it is now endangered. Does a Chinese gooseberry seem like just the thing for a fruit salad? How about a kiwifruit, the name it was given for export? Would you sauté using rapeseed oil? A hybridized version of this is the popular canola oil.
Transsexualism needs a new name. For one thing, that name is badly tainted. For another, it does not properly describe the congenital disorder. The term describes the solution—to change sex—and not the problem that necessitates the solution. The condition should have a name that conveys the concept of a sex mismatch between brain and body. Perhaps a Latin or Greek scholar could come up with something.
On the surface, Harry Benjamin Syndrome seems as good a term as any, even though it describes nothing. But it also has become tainted. Since few know about the taint (or the term at all), perhaps it could be relaunched, certainly more successfully than transsexualism could be. I have also seen the term neurological intersex. I think that term describes the condition rather well; intersex organizations, however, have quite a different opinion.
At any rate, for a term to have legitimacy, it probably needs to come from the medical establishment. So far, nothing useful is forthcoming. Instead, we get psychobabble like "gender identity disorder" and "gender incongruence."
Now if they used "sex incongruence," they might be onto something.