What if the lab results thought to be our own really were not? Hey, mistakes happen in all walks of life. And labs are not immune. But there are a few steps we can take to protect ourselves. Here they are:

• Ask your doctor about the lab he or she uses. It should be accredited and approved by the College of American Pathologists, a sign the lab meets high standards.
  
  
• If you can see the test tube or slide, make sure your name is on it. If you are in the hospital, make sure your wristband is accurate.

At the University of Florida, where my husband works, spouses can get campus I.D. cards which allow access to recreational centers, swimming pools, a university lake, and more. A few years ago, I stood in line for my card. It was during my chemotherapy treatment for breast cancer, and I wore a blond wig topped with a ball cap. Once at the front of line, a college student employee told me to remove my hat so my photo could be taken.

I couldn't take my hat off -- it covered a partial wig made for use with hats, and the very top was made of soft cotton and no hair. I didn't want to be photographed wearing my clown-like wig. I didn't want to be photographed bald. I wanted to look as normal as possible during a time when I felt nothing of the sort.

I told the I.D. center staff of my situation and although these young people seemed a bit unsettled by my story, they complied. And I now have an I.D. that pictures me, my blond wig, and my pink hat. It looks nothing like me. My post-chemo hair came in dark and curly.

David L. Katz, MD, responds to a reader in the September 2007 issue of The Oprah Magazine about the merits of eating soy in relation to preventing cancer. His response causes me to pause even more about jumping on any diet bandwagon.

Katz says we should eat soy foods -- just not too much because the evidence linking soy to breast cancer, for example, is mixed.

In comparing soy-eating Japanese women with American women who eat very little soy, researchers find lower rates of breast cancer in the Japanese women. But in a test tube, soy's plant estrogens can speed cancer cell growth. Maybe soy behaves differently in the body than it does in a tube. Or maybe soy has both negative and positive effects on breast cancer. Perhaps it's not soy at all. It could be that the populations eating soy are benefiting from not eating something else, like meat -- the saturated fat found in red meat has been linked to higher cancer rates. Replacing steak with something else may be the protective key.

If you plan to tune in to Good Morning America on Monday, you'll see Robin Roberts looking back at you. The co-anchor, 46, expects to back at work on August 13, just 10 days after surgery for breast cancer.

Roberts, who was just recently diagnosed with breast cancer after finding a lump during a self-exam, is still waiting for the test results that will determine her course of therapy. Right now, though, she feels great and looks forward to returning to work alongside Diane Sawyer.

Women with hormone receptor-positive breast cancer who have negative lymph nodes can take advantage of a test known as OncotypeDX. This test is used to estimate the risk of cancer recurrence in women diagnosed with early stage breast cancer. Results presented at the 2007 annual meeting of the American Society of Clinical Oncology said that the test results changed the oncologist's treatment decisions in about 31 percent of cases.

The test is useful in determining which patients are likely to benefit from chemotherapy in addition to hormonal therapy. It can predict the risk of a patient experiencing a recurrence up to ten years following diagnosis. The patient receives a Recurrence Score that ranges from 0 to 100, the higher the score -- the greater risk of recurrence.

This a great way for oncologists to be able to give individualized treatment -- instead of one size fits all. It's important to get chemotherapy if needed but physicians don't want to over-treat and have the unnecessary risk of side effects from chemotherapy treatment if it's not warranted.

I love it when I find research coming straight from the halls of the very hospital where I received my breast cancer treatment. It reminds me that I'm in good hands, that University of Florida researchers are on the cusp of breaking through the mysteries of cancer, that I may one day be the lucky recipient of cutting-edge discoveries, like this:

University of Florida researchers report in a paper to be published in the August issue of Stem Cells that bone marrow stem cells attracted to the site of cancerous growths often take on the appearance of the malignant cells surrounding them. While these cells look like cancer, though, they may not act like cancer. They have the same skin, says lead study author Dr. Chris Cogle. But the question is: do they have the same guts?

"Our results indicate these cells act as developmental mimics; they come in and look like the surrounding neoplastic tissue, but they aren't actually the seed of cancer," said Cogle who is affiliated with the cancer center I've called home for more than two years.

There is a new test that can identify potentially serious problems much earlier than the standard Pap smear, according to a recent large Danish study.

Think about this:

A new HPV test effectively checks women 40 and older for the virus that causes cervical cancer. The women who carry the virus are at significant risk for the disease and can truly benefit from this test. Women younger than 40 can still contract the virus but it tends to come and go and isn't as likely to lead to cancer. These under-40 women are sill better off receiving the standard Pap test, say researchers.

Source: Good Housekeeping, May 2007

UK researchers have developed a 3D laboratory model of human breast cancer, specifically ductal carcinoma in situ (DCIS). The model, complete with normal cells and tumor cells, should help experts understand how the disease develops in its early stages, and it could replace the need for experiments in animals.

About one in five breast cancers in the UK start out as DCIS. Researchers wanted to learn more about how the early cancerous changes in cells develop into larger tumors, and they chose to fashion a 3D test tube model because it is more complex than a layer of cells in a Petri dish.

Once this experiment is proved successful, it could reduce and perhaps replace animal studies.

"With breast cancer, there is an urgent need to move away from animal research models because their similarity to human cancer can be so poor," says one expert who explains this model could help revolutionize breast cancer research -- because unreliable research costs time, money, and lives, both animal and human lives.

Wouldn't it be great if we could find breast cancer long before something appears on a mammogram?

An FDA approved test called the Halo Breast Pap Test System might be able to do just that by collecting Nipple Aspirate Fluid (NAF). The test is designed to detect abnormal cells in the breast. The Halo system can identify benign disease as well as abnormal ductal cells that can be precursors to cancer.

Some research has suggested that ductal fluid excreted from the nipple can be used to identify a women's specific risk of breast cancer. A women with abnormal cells in the fluid has a four to five times greater risk of developing breast cancer.

Think about this:

The introduction of the HALO Breast Pap Test has been compared to the introduction of the Cervical Pap Test in the 1950s, which is widely credited with reducing cervical cancer death rates by more than 70 percent through the identification of abnormal cells in the cervix. Whether the same can be said for the breast pap test remains to be seen, but it is likely that the screen will be adopted by more OB-GYNs as oncologists push for ever earlier identification of cancer.

Those venturing into space face a very serious occupational hazard -- cancer. The disease can be caused by radiation from the cosmic rays and solar flares astronauts encounter when they travel beyond the Earth's protective magnetic layer or magnetosphere.

British scientists are working on rectifying this problem by creating a Star Trek-style deflector shield to protect astronauts from radiation.

Think about this:

Scientists wish to mimic the magnetic field that protects the Earth with shields deployed around spacecraft and on the surfaces of planets to deflect harmful energetic particles.

Details, presented at the Royal Astronomical Society's National Astronomy Meeting in Preston, UK, include the following:

• The idea has been linked to the deflector shields that protect the USS Enterprise and other spacecraft on Star Trek. The shields, like on the TV show, could be switched on and off.

• In order to make the shield, scientists must generate a magnetic field and then fill it with ionized gas, or plasma. As energetic particles interact with the plasma, energy is sapped away from them, causing them to slow down.

• Protective shelters would not work on long-duration space journeys due to the drip of energized particles, thought to be as harmful as large solar storms.

"The nice thing is that magnet technology is really quite evolved here on Earth," says Dr. Mike Hapgood, from the Didcot-based research centre. The question is can you take it into space?"

A team from Rutherford-Appleton plans to build an artificial magnetosphere in the laboratory. They would eventually like to fly a test satellite which would test the technology in space.

A reader posted a comment on one of my blogs and asked "What tests positively determines prostate cancer?" It prompted me to do a little research. 80 percent of men over 70 years old will get prostate cancer. That is a devastating statistic. A lot of times in the medical field diagnosing something requires a multitude of tests to rule out things and to get a better diagnosis. Such is the case for prostate cancer.

There are several tests used to diagnose prostate cancer. Blood tests, rectal exams, rectal ultrasounds, needle biopsy, and cystoscopy. A high level of PSA in the blood can be a sign of prostate cancer. PSA is a protein produced by cancerous prostate cells. With a rectal exam your doctor can feel for lumpy or a hard prostate. If a lump or hardening is found then most often they will do a needle biopsy to examine under a microscope. A cystoscopy is an examination of your bladder and uretha but can help determine several types of cancer and not just bladder cancer.

With all kinds of cancer, it is important to stay up to date with yearly exams for prevention. I hope this information helps.

Time to test your smarts -- about sleep, sun, food, and alcohol.

Just read the following questions, pick an option and then scroll down to determine if you really know what's best for your health.

• Is it healthier to sleep an extra hour or force yourself out of bed in the morning to exercise?

• Is it healthier to spend 15 minutes in the sun without sunscreen or two hours in the sun wearing SPF 30?

• Is it better to have a second glass of wine at dinner or a sinful dessert?

A new PSA density test may help identify men at high risk of developing prostate cancer.

The test, used after a biopsy finds no signs of life-threatening prostate cancer, can compare the size of a man's prostate to his levels of a cancer-related protein called prostate-specific antigen (PSA).

Even though both men with high and low PSA densities can have clean biopsies, studies show it's men with very high PSA densities who are at greatest risk of developing prostate cancer. This and the fact that biopsies can miss between 20 and 33 percent of tumors makes this new test a potential breakthrough for the prevention and detection of prostate cancer.

It's March. And that means it's the national month for Brain Injury Awareness, Endometriosis Awareness, Nutrition Awareness, Eye Health and Safety Awareness, Multiple Sclerosis Awareness, Sleep Awareness, Problem Gambling Awareness and my favorite, for the purposes of The Cancer Blog -- Colorectal Cancer Awareness.

Colorectal cancer -- cancer of the colon or rectum -- is a disease that affects both men and women and is preventable nearly 90 percent of the time.

Starting at age 50, men at women at average risk for the disease should get screened. Those with increased risk, like African-Americans who typically develop colorectal cancer at younger ages, should be screened even earlier.

Screening -- by way of fecal occult blood test (FOBT), flexible sigmoidoscopy, and colonoscopy -- is critical because colorectal cancer often occurs with no symptoms. Symptoms do sometimes present themselves in the later stages of the disease and include rectal bleeding, bright red blood in or on the stool, change in bowel habits, stools that are narrower than usual, general stomach discomfort, diarrhea, constipation, frequent gas pains, unexplained weight loss, constant fatigue, and vomiting. Persistence of any of these symptoms for more than two weeks warrant an immediate visit with a health professional.

Treatment for this disease, which strikes about 153,000 people and causes about 52,000 deaths each year, includes surgery, radiation, and chemotherapy.

In the spirit of this National Colorectal Awareness Month, experts recommend remembering these important points:

• Colorectal cancer can be prevented.
• Screening for the disease can identify polyps -- grape-sized growths in the colon and/or rectum -- that can be removed to prevent cancer from developing.
• The magic age for screening is 50 -- unless you have an increased risk for the disease.
• Colorectal cancer is treatable.
• Regardless of your age, know the risk factors, know the symptoms, and know your family history.
• Talk with your health professional about colorectal cancer and your own risk for the disease.

Early trials show a breath test for lung cancer detection may surface in the not-too-distant future. And it could be simple, inexpensive, non-invasive, and effective too.

The tests needs a good amount of work still, but if we keep our fingers crossed and medical researchers stay hot on the trail of this test, it just might be possible to one day spot lung cancer by simply breathing into a device for a few minutes.

The lung cancer breath test measures chemicals called volatile organic compounds (VOCs) in the breath. There's a certain pattern of VOCs associated with lung cancer, and they show up as colored dots across a quarter-sized panel.

The theory behind this test is great. The test itself is not perfect yet, however.

It's promising, though, says The Cleveland Clinic's Peter Mazzone, MD, MPH and colleagues who describe the test in the Online First edition of the journal Thorax and reveal the test correctly identified in studies three out of four people with lung cancer and detected lung cancer almost as frequently.