Is detecting BC classified as a pre-existing condition?

I would definitely agree with @kmakm on this. Having said that, they would surely have to prove that you and your GP had discussed a symptom that may have suggested bc??

That is very slippery wording @Wonk. Get thee to an ombudsmen if there's any trouble...

I agree with @Sister you need to have been diagnosed before changing funds.

Thanks ladies.  If they deem it to be a pre-existing condition, I will have to pay $500 excess (as this was under my old fund), whereas there is no excess under the new fund.
I found some fine print in the policy.  Can you interpret this wording?  It's the last line that I find unclear.

"A pre-existing condition is where signs or symptoms of your ailment, illness or condition, in the opinion of a medical practitioner appointed by us (not your own doctor), existed at any time during the six months before the day on which you purchased your health insurance or upgraded to a higher level of hospital cover. The medical practitioner we appoint must consider any information regarding signs or symptoms provided by your own treating general practitioner and/or specialist. It is not necessary that you or your doctor knew what your condition was or that the condition had been diagnosed."

I'm pretty sure that pre-existing condition refers to something that you are aware of/been diagnosed with.

I have no idea but if your last mammogram before you joined your new fund was clear, I don't think it can count as a pre-existing condition. @Zoffiel, @Romla?