5 timeless habits for better health
What are the symptoms of prostate cancer?
Is your breakfast cereal healthy?
When pain signals an emergency: Symptoms you should never ignore
Does exercise give you energy?
Acupuncture for pain relief: How it works and what to expect
How to avoid jet lag: Tips for staying alert when you travel
Biofeedback therapy: How it works and how it can help relieve pain
Best vitamins and minerals for energy
Should you take probiotics with antibiotics?
Medical Tests & Procedures Archive
Articles
New risk model could better identify people at high risk for pancreatic cancer
Research we're watching
A new tool to identify people who might be at higher risk for pancreatic cancer could help doctors find cases earlier, when they are most treatable. Researchers from the Harvard T.H. Chan School of Public Health created a risk model that did a better job than current models of finding people at high risk for the disease. It takes into account clinical and genetic factors as well as blood levels of biomarkers (substances that could potentially indicate disease). To test the model researchers used data from four large clinical studies. They applied the tool to 500 known pancreatic cancer patients and more than 1,000 people without cancer. The researchers then assessed how well the tool would have predicted the risk of pancreatic cancer. Pancreatic cancer, which is the third leading cause of cancer death in the United States, is challenging to treat because most people already have advanced disease when they are diagnosed. It's hoped that identifying people who are at high risk will eventually allow doctors to screen these individuals to find cancers when they are smaller and more curable.
Image: Raycat/Getty Images
Can high-tech heart scans help prevent heart attacks?
Cardiac CT angiography is gaining ground as a fast, effective way to diagnose coronary artery disease.
If you experience a short-lived squeezing sensation or discomfort in your chest when you exercise or feel stressed, one possible cause is inadequate blood flow to the heart. Known as stable angina, this condition suggests you have heart disease and may be at risk for a heart attack.
Doctors can use a number of different tests to diagnose (or rule out) inadequate blood flow to the heart muscle. The first step is frequently a type of stress test, which checks the heart's electrical activity, muscle function, or blood flow patterns while the heart is under stress from exercise or medication. Stress tests can identify areas of reduced blood flow, which suggest a narrowing in the artery that supplies that part of the heart.
Different types of echocardiography
Ask the doctor
Q. A friend recently had what his doctor called a "3D echocardiogram." How is that different from a standard echocardiogram?
A. All echocardiograms use high-frequency sound waves (ultrasound) to create still and video images of your heart. But there are two different procedures for getting the images and several variations of this common test, which doctors often refer to simply as an echo.
Autoimmunity indicators on the rise among Americans
Research we're watching
An increasing number of Americans have a blood abnormality that indicates autoimmunity, which means their immune system has created antibodies that could work against the body's own cells, according to a study published April 7, 2020, in Arthritis and Rheumatology. Autoimmunity can lead to autoimmune diseases such as rheumatoid arthritis or lupus, although the study authors said they didn't look to see whether the prevalence of diagnosed autoimmune diseases also rose during the same period of time.
The researchers found a rise over two decades in the number of people who had positive antinuclear antibody (ANA) blood tests, a signal of autoimmunity. They used blood samples taken from 14,211 people ages 12 and older, as part of the U.S. National Health and Nutrition Examination Survey. In samples taken in the period 1988 to 1991, ANA prevalence was 11%. It rose slightly to 11.5% for the 1999–2004 time period, and to 15.9% in the 2011–2012 period. Comparing differences in gender, race and age, the largest increases in positive ANA tests occurred in men, non-Hispanic whites, adolescents, and adults ages 50 and older.
Combining two types of biopsies helps diagnose prostate cancer
In the journals
Combining two kinds of biopsies may lead to a more accurate diagnosis of prostate cancer, suggests a study in the March 5, 2020, issue of The New England Journal of Medicine. Researchers from the National Cancer Institute enrolled 2,103 men with prostate abnormalities. Each man had a standard 12-point biopsy and an MRI-targeted biopsy.
With a 12-point biopsy, tissue samples are taken from 12 systematically placed spots on the prostate. An MRI-targeted biopsy uses an MRI image of the prostate to help doctors locate areas where cancer is most highly suspected. Previous research has shown that MRI-targeted biopsies are more accurate than 12-point biopsies. However, even MRIs can miss some tumors.
Should I be screened for hepatitis C?
Ask the doctors
Q. A friend told me that I should be screened for hepatitis C. I'm not in a high-risk group. Is this really necessary?
A. If you're an adult younger than 80 years old, the answer is yes. In March, a government health advisory group, the U.S. Preventive Services Task Force (USPSTF), revised its earlier position and now recommends that all people ages 18 to 79 be screened for this "silent" virus. Prior to this change, the USPSTF recommended only that only high-risk individuals or adults born between the years 1945 and 1965 be screened. Hepatitis C can attack the liver and lead to serious liver damage and liver cancer. The condition is curable if detected. But people often don't consider themselves at risk and are unaware that they are infected, because they typically don't have symptoms.
Are you old enough to give up your screening mammogram?
There's no easy answer to this question. Rather, women should make the decision based on their individual needs.
Most women don't look forward to their routine mammogram, which can be uncomfortable and stressful. You may wonder: Is there an age when can you dispense with this regular chore? 75, 80, 85?
The truth is that experts haven't determined a magic age when women no longer need breast cancer screening — largely because scientific evidence in this area is lacking, says Dr. Kathryn Rexrode, associate professor of medicine at Harvard Medical School and chief of the Division of Women's Health at Brigham and Women's Hospital. But many experts also agree that continuing mammography might not be the right choice beyond age 75. The real question, they say, is what is the right age for you to stop based on your individual needs? To decide, you need to understand both the potential risks and benefits of breast cancer screening.
Blood test might reveal dementia
Research we're watching
Could a single blood test one day enable doctors to diagnose Alzheimer's disease? Researchers writing in the March 2 issue of Nature Medicine say they've made advances in this area. The blood test they developed measures the concentration of pTau181 — a form of the tau protein associated with brain changes in Alzheimer's disease — in the body's blood plasma. They used the test on samples collected from more than 400 people who were part of an ongoing -memory study.
The researchers found that the blood test was able to accurately detect which patients had Alzheimer's, which were healthy, and which had a different type of dementia caused by a neurodegenerative disease. Today, doctors typically diagnose Alzheimer's using a series of tests designed to rule out other causes, but the process is time-consuming and costly. The researchers are now aiming to refine the test further, in hopes that it will someday make it easier to detect Alzheimer's at an early stage, when the disease may be easier to treat.
When should I be concerned about the color of my urine?
On call
Q. When should I worry about changes in the color of my urine? What color is considered healthy?
A. If a person is well hydrated, the normal color of urine is a pale yellow. Someone who drinks large amounts of fluid or takes diuretics (water pills) can have almost clear-looking urine. A dark yellow color may indicate a need to increase your fluid intake.
Hepatitis C screenings now include all adults up to age 79
Â
News briefs
The guidelines are changing when it comes to screening for hepatitis C, a silent viral infection that attacks the liver and can cause cirrhosis, liver cancer, or liver failure. Back in 2012, the CDC recommended a one-time hepatitis C screening for the so-called baby boomer generation (anyone born between 1945 and 1965), a group that made up about 75% of all hepatitis C cases at that time. The following year, the U.S. Preventive Services Task Force (USPSTF) agreed. Now the USPSTF is expanding the screening age to all adults ages 18 to 79. The move is meant to identify more people in early stages of infection and comes as hepatitis C cases have increased almost fourfold since 2010. The USPSTF also advises screening for people outside of the recommended age range if they have ever used injected drugs. The recommendations were published online March 2, 2020, by JAMA. The CDC is in the process of developing similar recommendations. The screening requires only a simple blood test.
Image: jarun011/Getty Images
5 timeless habits for better health
What are the symptoms of prostate cancer?
Is your breakfast cereal healthy?
When pain signals an emergency: Symptoms you should never ignore
Does exercise give you energy?
Acupuncture for pain relief: How it works and what to expect
How to avoid jet lag: Tips for staying alert when you travel
Biofeedback therapy: How it works and how it can help relieve pain
Best vitamins and minerals for energy
Should you take probiotics with antibiotics?
Free Healthbeat Signup
Get the latest in health news delivered to your inbox!
Sign Up
