Lichen planus is a common condition that causes inflammation (swelling and irritation) on your skin or inside your mouth.

Gliomas are a group of tumors that start in the glial cells in the brain. These cells support the function of the main brain cell type, the neuron. Read on to learn more.

Buerger's disease causes a tightening, or a blockage, of the blood vessels in your feet and hands. Read on to learn more.

Detailed information about Zollinger-Ellison syndrome (ZES), a rare digestive disorder.

Few activities in life seem as natural as eating and drinking. We do them every day without giving them much thought. Yet, what happens inside your body after you eat is an interesting and complex process.

At 20 feet long, your small intestine is the longest part of the human digestive system. Most of the digestive process takes place there.

Primary sclerosing cholangitis (PSC) is a rare disease that attacks the bile ducts. The word sclerosing means scarring. In PSC, your bile ducts become scarred and slowly narrow until bile backs up into your liver and starts to damage it. Read on to learn more.

The liver is the largest organ in your body. At about 3 pounds and about the size of a football, it performs many functions essential for good health and a long life.

A Mallory-Weiss tear is a tear of the tissue of your lower esophagus. Learn more about this condition, including cause, symptoms, diagnosis, and treatment.

If your healthcare provider determines that you have an intestinal obstruction, it means that something is blocking your intestine. Food and stool may not be able to move freely. Read on to learn more about this condition, including symptoms, diagnosis, and treatment.