Dear Geebra:
As others have mentioned, it is only lying if you do not disclose something that will impact your job performance. Assuming you will be able to do the job without the PCa getting in the way, there is no reason to disclose. And, why would you want to give anyone a reason, however subtle, to not hire you?
However, recognize that you might need to divulge the issue after being hired, depending on what questions are asked when you sign up for the health insurance...and you should, of course, be truthful if asked the question in that situation.
If you are still uncomfortable after all of us armchair lawyers have given our advice, maybe this is something you might run by your family attorney...
Tudpock