Children with attention deficit hyperactivity disorder (ADHD) usually struggle with behavior that is impulsive and overactive, or difficulty keeping their attention focused, or both.

For some patients, living with chronic myelogenous leukemia ( CML ) isn't terribly difficult; it just means taking a single pill once a day and living normal life.

National Geographic fans are probably familiar with footage showing a mama bear's reaction to people who accidentally get close to their cubs. Those mamas attack without holding anything back.

Because rectal cancer is usually discovered at an advanced stage, chemotherapy and/or radiation are often given to shrink the tumor before surgery. Measuring the effectiveness of these treatments can predict the course of the disease.

Cardiologist John Bisognano, M.D., Ph.D. has patients coming in "carrying bags full of 'natural' products that they hope will help lower their blood pressure." He wanted to know which ones work.

Bath salts are becoming more popular but not the kinds that are sprinkled into baths. Scientists have developed a test for these salts that might help law enforcement.

Testing new drugs is no easy task. Animal testing may show successful results that aren't replicated in humans, and having drug trials in individuals could result in undesirable side effects.

Most often, patients consider having a genetic risk for a disease means that having a gene increases the likelihood of developing a particular medical condition. That's not the case with a new Parkinson's gene.

It's so tiny that it can be implanted through a biopsy needle. Yet what this device does is anything but tiny, and could be a big boon to cancer therapy.

There's no better day than today to change your diet and quit smoking. Benefits from these lifestyle changes appear to take effect within months.