We're not even 11 days into Skin Cancer Awareness Month, and already my awareness about the disease has been raised several times.

Today, I learned that measuring the amount of melanin in a strand of hair can predict a person's risk for melanoma. It's all detailed in the May 15 issue of the American Journal of Epidemiology. And the study leading to this new conclusion -- that the amount of melanin in hair indicates an individual's skin type -- is quite interesting.

Think about this:

Researchers involved in a large skin cancer trial measured 2,3,5-pyrroletricarboxylic acid (PTCA) levels of 98 subjects with melanoma and 98 subjects without melanoma. They found the subjects with a PTCA concentration below 85ng/mg had more than four times the risk of developing melanoma.

Fewer women are getting mammograms. Facilities offering mammograms are closing. Mammogram machine usage is declining. And we don't really know why.

"We're heading in the wrong direction," says Carol Lee, professor of radiology at Yale University School of Medicine and chair of the American College of Radiology's commission on breast imaging.

"If this decline holds up, it will be very worrisome," she says.

"We're looking at a possible increase in deaths if we see this continue," according to Diana Balma, vice president of public policy at Susan G. Komen for the Cure.

Studies don't show which women -- rich or poor, young or old, educated or uneducated -- are skipping these critical screenings, but there are a few possible reasons for this dangerous drop.

Think about this:

Perhaps there are fewer facilities, staffed by fewer radiologists and technologists due to high lawsuit rates and modest reimbursement. This is scary -- because the number of women old enough to get screened is increasing.

Women may be missing out on all sorts of necessary medical care because of inadequate health insurance or other access problems.

Women may be choosing, for whatever reasons, not to get mammograms, despite strong public urging that women age 40 and older get screened one time every year.

And now think about this:

Recent news about declining breast cancer rates may not be all that good. It may not be that fewer women are developing breast cancer. It may simply be that fewer women are getting early diagnoses because of irregular or nonexistent screening.

It seems screening for lung cancer doesn't save lives and it doesn't prevent advanced disease. But it does lead to potentially unnecessary and harmful treatment.

This isn't the final word on the use of CT scans to screen smokers and former smokers for the disease. But right now, the hope some experts had for the special X-rays to detect tiny lung abnormalities has been diminished by a large study that is still in the works. And until conclusive evidence says the screening is useful, the American Cancer Society will not endorse the test.

While CT screening did increase diagnosis and treatment -- those screened were three times more likely to be diagnosed with lung cancer and 10 times more likely to have lung surgery than predicted -- study co-author Dr. Peter Bach of Memorial Sloan-Kettering Cancer Center in New York says, "We don't see a trace of evidence that a single life was saved, that a single case of advanced cancer was avoided."

And because CT scanning led to more biopsies and surgeries, patients were put at risk for complications such as lung puncture, bleeding, and infection, according to Bach, whose work is published in the Journal of the American Medical Association.

"Getting screened for lung cancer with CT scanning is not only unproven, it's potentially a risky endeavor," he said.

Until an effective screening tool emerges -- possibly still years away -- experts say there is one surefire way to protect yourself from lung cancer. Stop smoking.

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.

On August 9, Patty was diagnosed with breast cancer. She is 36 years old, a wife, a mother of four children -- and already a fighter in her battle that has just begun. So far, she has endured surgery, and she will soon proceed through months of intensive chemotherapy, one year of Herceptin treatment, and weeks and weeks of radiation. It's a familiar path for so many women -- a path marked by devastation, fear, worry, and panic. Yet if there is a gift that flows from cancer, it must be the support and concern and love that can cushion the blow delivered by this disease.

Patty has an abundance of support -- and it all starts with her husband, ironically an administrator of two cancer centers, who is blogging her journey with great strength and an overwhelming love for his wife whose own mother died of breast cancer in 1992 at the age of 46. Patty and her husband have been vigilant about monitoring her health over the years -- in light of her family history -- and Patty had been tested, screened, biopsied, and examined many times before her diagnosis. When her recent tests and biopsies revealed breast cancer, it was both shocking and expected.

Now Patty and her husband -- who authors the blog Patty's Journey -- are expecting the best of outcomes on this journey of a lifetime.