"No, that's not correct. Your entire post is based on a fundamental misunderstanding of the way incidence is counted. Someone who (improbably) had CC at 25, and again at 84 would be counted as having it twice, not once."
No, my post is based on the paragraph I quoted. Please read it again. I'm making a point about the methodology used. They're saying that they're counting the age of a fatal cancer as the age at diagnosis, not the age of death.
You don't 'get' the same cancer twice. You get it once. You go into remission if your treatment is successful. Even if you go into complete remission, (no evidence of cancer) you can still get recurrence.
www.webmd.com/cancer/remission-what-does-it-mean
"No you can't, at least not very far. Mammograms use an x-ray. That supplies a dose of radiation. "
Yep, I know, not only have I got physics A level - I've had loads of X rays. Chest X rays, dental x rays, my leg x rayed when I broke it aged 5, and various other bits through the years. They haven't given me cancer. There is really no evidence I'm aware of that mammograms, as recommended by the NHS, cause cancer at any significant level but if you have any, bring it on. The radiation in a mammogram is less than a fifth of the exposure you'd get annually through normal background radiation, and mammograms are only recommended over 50 every five years.
There is a theoretical risk that the radiation can cause cancer. They tell you that to avoid being sued I suspect. But I should think that is only really a risk in countries that recommend them annually from young ages.
The harm of mammography is in overtreatment for cancers that would not become life threatening, not in the mammogram itself. Cancer treatment can kill you, Herceptin - for example - can cause heart failure.
Mammography does reduce deaths from breast cancer, what it doesn't reduce is all cause mortality.
www.ncbi.nlm.nih.gov/pmc/articles/PMC4415291/
LLETZ or cone biopsy can cause infections, which theoretically can lead to sepsis, which can lead to death, in the absolute worst case. (no idea if this has ever happened, the NHS don't really tell you stuff like that, they just say contact your doctor if you have any signs of infection, but given you can die of sepsis post childbirth, nearly happened to a friend of mine, I don't see why infection post LLETZ should be different). Yes, neither is a smear test, but there's very little point in having a smear test if you're not prepared to have any abnormal cells removed.
"You are also ignoring the fact that with screening, the aim is prevention. The programme is not looking for cancers so much as for cellular changes that could lead to cancers (CIN)."
I've made that point in nearly every post I've put on this. Read them. It's my entire objection to cervical screening - the very high possiblity. of overtreatment. Which is also my objection to mammography, which is why I'm saying they're comparable.