MONDAY, Sept. 20 (HealthDay News) -- A group of health conditions collectively known as metabolic syndrome may pose an even greater danger to the heart than previously recognized, new study findings suggest.

SUNDAY, Sept. 19 (HealthDay News) -- Newly identified gene mutations may affect breast cancer risk in some women, an international team of researchers has found.

(HealthDay News) -- Our careers and busy lifestyles are leaving many of us sleep deprived.

(HealthDay News) -- Wildfire smoke can cause serious respiratory problems, especially among people who already have difficulty breathing.

MONDAY, Sept. 20 (HealthDay News) -- More overweight teenagers are undergoing laparoscopic gastric band surgery, a weight-loss procedure that isn't approved for anyone under 18 years old, a new study finds.

MONDAY, Sept. 20 (HealthDay News) -- Children made ill by the 2009 pandemic H1N1 swine flu virus suffered more seizures and other nervous system problems than those with seasonal flu, a new report reveals.

MONDAY, Sept. 20 (HealthDay News) -- Men and women have the same responses to the anti-HIV drugs darunavir and ritonavir, researchers have found.

MONDAY, Sept. 20 (HealthDay News) -- The intravenous administration of aspirin appears to be a safe and effective way to treat hospitalized patients suffering from either severe headaches or migraines, new research indicates.

MONDAY, Sept. 20 (HealthDay News) -- At least part of the blame for childhood obesity might be traced to a unexpected cause -- a certain strain of the virus that causes the common cold.

SUNDAY, Sept. 19 (HealthDay News) -- New genetic variants linked to ovarian cancer risk have been identified by an international consortium of scientists.

MONDAY, Sept. 20 (HealthDay News) -- About one in 10 U.S. teens slather on sunless tanning products, and those who do are more likely to get sunburns and engage in other skin-damaging behaviors such as indoor tanning, a new study finds.

MONDAY, Sept. 20 (HealthDay News) -- Annual flu shots may protect against heart attacks, and the earlier in the season a shot is given the greater the protection, a new British study claims.

SUNDAY, Sept. 19 (HealthDay News) -- For asthma patients whose condition is not controlled with standard inhaled steroids, the addition of Spiriva -- a medication already approved for lung disease -- appears to improve breathing, a new study finds.

MONDAY, Sept. 20 (HealthDay News) -- Two new studies may help breast cancer patients and their doctors make treatment decisions involving immediate breast reconstruction after mastectomy.

MONDAY, Sept. 20 (HealthDay News) -- U.S. Food and Drug Administration advisers begin two days of hearings Monday on whether to recommend approval of genetically modified salmon for humans to eat.

Here are some of the latest health and medical news developments, compiled by the editors of HealthDay:

(HealthDay News) -- Here are the latest clinical trials, courtesy of ClinicalConnection.com:

MONDAY, Sept. 20 (HealthDay News) -- You don't necessarily have to sweat it out at the gym for hours every week to have a healthy heart. If your job keeps you relatively active, you're reaping heart benefits, suggests new research.

MONDAY, Sept. 20 (HealthDay News) -- Small disc batteries can do severe damage to the esophagus of very young children who accidentally swallow them, a new pediatric case-study review suggests.