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So you just had your Pap smear or your mammogram and it wasn't that bad was it? Or your colonoscopy. Okay, it really was that bad, but you didn't remember it. Are you wondering when you can stop doing these tests?

I asked a woman I know, who is in the health and fitness business, when she thought she could stop doing her cancer screening, you know, Paps, mammos, colonoscopy. She said, "Never," with a smile. She never wanted to stop her cancer screening, "It isn't all that bad, and it makes me feel safe," she said. I replied that cancer screening decisions about when and how often is a cost, risk, benefit analysis, and there are some data to inform that decision. She said, "You go with your brain, I go with my heart."

Well, let's go with the brain for a little while, okay? Let's start with Pap smears. The recommendations about Pap smears have been changing as we know more about what mostly causes cervical cancer -- the HPV virus -- and how fast it grows, usually not too fast. Cervical cancer does not increase with age for a lot of reasons. Sexual activity and the number of partners doesn't increase with age. Well, usually. And the cervix in postmenopausal women may not be as receptive to the virus. So there are good reasons to say that when you get to 65, if you've had normal Pap smears for the past 10 years, that means you actually have been having Pap smears in the past 10 years, and you haven't had an abnormal Pap in 20 years, you can stop testing. There's some pretty solid numbers to back this up, and the U.S. Preventive Services Task Force makes that recommendation.

Okay. How about colonoscopy? Well, colon cancer does not decrease with age. But if you don't have any family history of colon cancer and if your previous colonoscopies, that assumes that you've had some, have not shown any polyps or precancerous lesions, you can stop at 75. That's the recommendation of the U.S. Preventive Services Task Force and the American College of Physicians.

Lastly, mammography. Breast cancer does not decrease with age. It increases with age. The aggressiveness of breast cancer is less in older women than it is in younger women. But women still will get treated, which can be aggressive in and of itself. The U.S. Preventive Services Task Force said there's not enough evidence to recommend for or against mammograms at age 75 and older. But about a quarter of deaths from breast cancer each year are attributed to a diagnosis made in women after the age of 74. Women as they get older are less likely to get mammograms. About three-quarters of women 50 to 74 have had a mammogram in the past two years, but only 40% of women over 85. Of course, many women over 85 are in poor health, and mammography is just not on the list of things to do. And clinicians are less likely to recommend mammography if a woman is in poor health. The American Cancer Society suggests women should continue mammograms as long as their overall health is good and they have a life expectancy of at least 10 more years.

Well, how long am I going to live? I went online and Googled, "How long will I live?" There are lots of calculators because insurance companies and pension plans really want to know. Well, I tried a life expectancy calculator that was developed by the University of Pennsylvania and has been mentioned in the mainstream media. It asks sex not gender, age, height, weight, alcohol, smoking, diabetes, marriage status, whether I exercised, ate my veggies. I didn't fudge my weight or height. This calculator said I was going to live till 93 and I had a 75% chance of living to 85.

Another life expectancy calculator from confused.com asked me just a few questions, not my height or weight,or smoking, or alcohol, or diabetes. It did ask my relationship status, and options included happy relationship and married, but these were mutually exclusive. You could only pick one. Well, this one had my life expectancy of 97. And the calculator from Northwest Mutual, a well-respected life insurance company, cranked me out at 98.

Well, I really don't want to hang around the planet all that long. But I really hope that my savings will take me up there, and I'm going to have to have mammograms for a while yet.

Thanks for joining us for the "Seven Domains of Women's Health" on The Scope.

Dr. Jones: New news and old news about the risk of breast cancer and hormonal birth control. Get ready for some really very big and very small numbers. This is Dr. Kirtly Jones from Obstetrics and Gynecology at University Health and this is The Scope.

Announcer: Covering all aspects of women's health. This is The Seven Domains of Women's Health with Dr. Kirtly Jones on The Scope.

Dr. Jones: Today we're going to talk about hormonal birth control and the risk of breast cancer. Primarily, we'll talk about birth control pills, but we'll also talk about hormonal patches, shots, implants, and IUDs. There are now 50 years of data on the topic of hormonal birth control pills and the risk of breast cancer. Largely, the studies have suggested that there's no significant increased risk of breast cancer in birth control pill users except maybe in women who used pills starting early in their teens, used them for a long time, and use them into their 40s. Recently, a study from Denmark looked at 1.8 million women between the ages of 15 to 49 who had used hormonal contraception between 1995 and 2012. They were using contraceptive methods that are commonly prescribed today. Because Denmark has a health system that can follow everyone and link diagnosis with prescriptions and health outcomes, they can really do big studies.

So what did they find? First, the extra risk of breast cancer in women of this age group who took hormonal birth control of any type during this time period was 13 extra breast cancers per 100,000 women per year. That's a very small number, 13, out of a pretty big number, 100,000. That is, for every 100,000 women using hormonal birth control, there are 68 cases of breast cancer annually compared to 55 cases a year among non-users. Another way to crunch these numbers is to say there was one extra breast cancer for every 7,690 women using hormonal contraception.

Of course, the details are a little more interesting. For the users of hormonal patches, the extra breast cancers were 5 per 100,000, but it ranged from 1 fewer and 11 more, and essentially it wasn't different from women not using hormonal birth control. Maybe there are just weren't as many women taking it. It's not clear, because the hormonal patch is kind of like the hormonal pill.

For women using vaginal rings, there were two fewer breast cancers. But the statistical range was 32 fewer to 28 more. So there wasn't any increased risk in this group.

The same kinds of numbers were seen for women using contraceptive implants or injections. There were about 5 to 10 fewer breast cancers, but the ranges were so large that there really wasn't an increase or a decrease.

Hormonal IUD users had about the same increase as pill users with about 16 extra breast cancers per 100,000 women. Importantly, and listen to this, the risk for women under 35 years of age was 2 extra breast cancers per 100,000 women per year, a really small number. Young women had a lower risk of breast cancer on hormonal contraception than older women. And women who had used hormonal contraception for a long time, meaning 10 years or more, had a slightly larger absolute risk than women who only used it a short time.

So what do we do with these numbers? First, don't panic. Every time there's bad news about contraception, even if it's barely bad, women stop their contraception and the unplanned pregnancy rate and abortion rate goes up. Now there, you're really taking some risks. It is really hard to know how to counsel women about a risk that is one extra per 7,960 women. Those are numbers that people don't really understand very well. Also, people really don't like numbers like 7,960. They like 10 or 1,000.

So I consider a significant risk is 1 extra in 10. A low risk is 1 extra in 100. A very low risk is 1 extra in 1,000, and an extremely low risk is 1 extra per 10,000, and that's really what we're talking about. The authors of this study admit that they didn't control for age of first period in these ladies, alcohol consumption, breastfeeding, and physical activity. All of these activities increase or decrease the risk of breast cancer by a little. Breastfeeding decreases the risk of breast cancer, and certainly women who breastfeed are less likely to use hormonal birth control. So that could be part of why there was a slight increase in hormonal birth control users.

Now, there's something called biological plausibility. In population studies, they'd find a correlation of one thing with another. Let's pick alcohol. People who drink alcohol moderately live longer. People who drink alcohol a lot don't live so long. Now, is it the alcohol that makes you live longer? Or is it the people who drink alcohol have more fun, have more friends, and having friends makes you live longer? So this is a biological plausibility issue.

Is there a biological reason that hormonal contraception might very slightly increase the risk of breast cancer? Over the past 20 years, researchers have been more interested in the progestin component of the hormonal contraception and menopausal hormone replacement therapy. We always thought that the risk for breast cancer was all about estrogen, but progestin, that other hormone in hormone replacement or in hormonal birth control, seems to add a little risk as well. So there's a possible biological reason for this very small increase in breast cancer in hormonal contraception users.

The authors of this study also suggest that women don't panic, but they didn't exactly say that. They mentioned that hormonal birth control pills have substantial health benefits. Birth control pills substantially decrease the risk of uterine and ovarian cancer and possibly colon cancer. In fact, women who have the BRCA gene for breast and ovarian cancer have been suggested to take birth control pills because even if the risk of breast cancer is slightly greater, the risk of ovarian cancer, a cancer that's hard to detect and hard to treat, is so much less on birth control pills.

So what should you do? We all know that hormonal contraception comes with risks and benefits. For the vast majority of us, the ability to control when and how often we have children is a fundamental factor in our ability to manage our lives. Many women use hormonal birth control, such as hormonal IUDs, to manage flooding periods and pain that debilitates them every month.

If these recent findings are a major concern for you, talk to your clinician about the risks and benefits for you personally. Not you in 100,000 women. Put things in your own personal perspective. There are options for us, probably more than you know, and thank you for joining us on The Scope.

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Dr. Jones: "It brought a lump to my throat." This is a phrase that usually implies an emotional response to something. But what if there's really a lump in your throat? Or really a lump in your neck? This is Dr. Kirtley Jones from Obstetrics and Gynecology at the University of Utah Health, and we're talking about thyroid cancer and women today on The Scope.

Announcer: Covering all aspects of women's health, this is the Seven Domains of Women's Health with Dr. Kirtly Jones on The Scope.

Dr. Jones: Most of the time one of our most important hormone glands in our body just does its thing without us feeling it. For women, men are another story, the thyroid is the only gland that we can touch with our fingers. It's sort of a flat butterfly-shaped gland about two inches across in the front of our neck in front of our throat. It regulates the metabolism at every cell in the body.

Millions of women have thyroid problems, the most common being under or overactive thyroid. The majority of people in the United States with thyroid problems are women. We're not sure why that's the case except that most thyroid problems are due to autoimmune disease, antibodies that we make against part of the thyroid gland. All autoimmune diseases are more common in women.

Over and underactive thyroid symptoms are vague. The symptoms are feeling cold or slightly depressed. For underactive thyroid, feeling hot, your heart pounding and anxious, maybe weight loss are common for overactive thyroid. Sometimes the thyroid is slightly enlarged with over or underactive thyroid problems, but thyroid cancer presents as a lump. Sometimes the lump is noticed by the patient, but sometimes it presents with hoarseness of voice or difficulty swallowing, and sometimes the lump is detected by a clinician during a physical exam.

It's important to know that lumps in the thyroid are very common, and only 5% to 10 % of lumps in the thyroid in women are cancer. Now, thyroid cancer is the most cancer in women 15 to 30 years of age and is the second most common cancer after breast cancer in women under 50. Seventy-five percent of all thyroid cancers occur in women. And thyroid cancers generally happen younger in women than men.

There are a number of risk factors for thyroid cancer, the majority of which you can't change. I already mentioned that being a woman is one of them and you mostly can't change that. There are families that have genetic mutations that make cancers more common, and thyroid cancers are part of that family risk.

Another risk for thyroid cancer is exposure to radiation, especially as a child. The most common reason for a young person to have radiation exposure these days is because of radiation treatment for another cancer when the person was a child. Also, for those of us who grew up in the Intermountain West, the increased exposure to radiation from nuclear testing in the 50s is associated with a slightly increased risk of thyroid cancer. And of course exposure to an accident at a nuclear power plant that releases radiation can increase the risk, but this is uncommon.

Finally, children with a low diet in iodine are at an increased risk, but that's uncommon in the U.S. because table salt and sea salt have iodine and iodine is found in fish and is added when salt is added to some foods. Now, if you have a lump in your thyroid or an enlargement in the front of your neck where your thyroid is, you should see your doctor. The doctor will feel your thyroid, do a blood test to check out the thyroid hormones, and sometimes check a blood test to see if you have antibodies to your thyroid.

If there's any question of a lump in the thyroid, an ultrasound of your thyroid is the next step. If the ultrasound shows a lump, the next step could be to collect cells from the lump with a small needle. Now there's some controversy about when to do this test. So many thyroid lumps or nodules are totally benign. If the lump is less than a half inch or about one centimeter, most experts would just recommend watching it over time, unless of course you have a family history of thyroid cancer. In that case, you really need to watch things more carefully and the biopsy would be right.

If it's over an inch, most experts will recommend a biopsy. Now, if the biopsy shows cancerous cells, the next step is surgery usually to remove the thyroid and make sure the cancer hasn't spread to the lymph nodes. If it's spread, the next step can be radiation. It's most important to know that thyroid hormone can be easily and inexpensively replaced with a pill if you've had your thyroid removed. The other important fact, and listen up, is that thyroid cancer in young women is very curable with over 90%, survival for 20 years. So thyroid cancer is one of the most curable kinds of cancers.

So if you have a lump in your throat, first check out and make sure it isn't really your adorable child or the movie you're watching, but if it really is a lump in your neck, and bring it to your attention to your doctor. The chances are highly likely that it isn't cancer, but it should be evaluated. And if it's found to be thyroid cancer, it's often easily cured in women, and that's the best news. And thanks for joining us on The Scope.

Announcer: Want The Scope delivered straight to your inbox? Enter your email address at thescoperadio.com and click "Sign Me Up" for updates of our latest episodes. The Scope Radio is a production of University of Utah Health Sciences.