Originally broadcast November 21, 2014.

They advertise low, low prices. But does anyone actually pay that rate? Erica Johnson investigates.

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Primary biliary cholangitis (PBC), formerly known as primary biliary cirrhosis, is a chronic liver disease resulting from progressive destruction of the bile ducts in the liver – called the intrahepatic bile ducts. Bile produced in your liver travels via these ducts to your small intestine where it aids in the digestion of fat and fat-soluble vitamins (A, D, E and K). When the ducts are destroyed, bile builds up in the liver contributing to inflammation and scarring (fibrosis). Eventually this can lead to cirrhosis and its associated complications, as scar tissue replaces healthy liver tissue and liver function becomes increasingly impaired.

Watch that Ectopic Baby Medical Abortion Surgery

Behcet's (beh-CHETS) disease, also called Behcet's syndrome, is a rare disorder that causes blood vessel inflammation throughout your body. The disease can lead to numerous signs and symptoms that may seem unrelated at first. They may include mouth sores, eye inflammation, skin rashes and lesions, and genital sores. The effects of Behcet's disease vary from person to person and may clear up on their own. Treatment involves medications to reduce the signs and symptoms of Behcet's disease and to prevent serious complications, such as blindness.

There are several ways to do minimally invasive aortic valve surgery. Techniques include min-thoracotomy, min-sternotomy, robot-assisted surgery, and percutaneous surgery. To perform the different procedures: Your surgeon may make a 2-inch to 3-inch (5 to 7.5 centimeters) cut in the right part of your chest near the sternum (breastbone). The muscles in the area will be divided. This lets the surgeon reach the heart and aortic valve. Your surgeon may split only the upper portion of your breast bone allowing exposure to the aortic valve. For robotically-assisted valve surgery, the surgeon makes 2 to 4 tiny cuts in your chest. The surgeon uses a special computer to control robotic arms during the surgery. A 3D view of the heart and aortic valve are displayed on a computer in the operating room.

3D Printed Models Used in the Mayo Clinic's First Face Transplant

Baby Born Still Inside The Amniotic Sac

A pneumothorax can be caused by a blunt or penetrating chest injury, certain medical procedures, or damage from underlying lung disease. Or it may occur for no obvious reason. Symptoms usually include sudden chest pain and shortness of breath. On some occasions, a collapsed lung can be a life-threatening event.

The brain is made up of billions of nerve cells that are specially designed to communicate with each other. They form many connections with one another, creating an intricate network between cells.

I have elevated prolactin levels. What does this mean? What can I do to regulate my hormones? watch to learn more

Knee replacement involves replacing a knee joint that has been damaged or worn away, usually by arthritis or injury. Find out more here: http://bit.ly/MAdfmE

The content is intended for general information only and does not replace the need for personal advice from a qualified health professional.

This video demonstrates a technique for reducing a dislocated hip. This patient had recurrent dislocations of his artificial hip.

Watch that video of A Big Size Fibrodenoma Removal Surgery

RLS can make it hard or impossible for you to get enough sleep. Try these home remedies:

PAD laser plaque removal

Dopamine is the one neurotransmitter that everyone seems to know about. Vaughn Bell once called it the Kim Kardashian of molecules, but I don’t think that’s fair to dopamine. Suffice it to say, dopamine’s big. And every week or so, you’ll see a new article come out all about dopamine.

Stop and chop surgery on a hard cataract on a small pupil.

The first transplant of a bionic eye on a patient with a rare disease.

This video demonstrates how bronchoscopy and vocal cord mass injections can be performed under endoscopic guidance in a patient without any sedation. Only topical and local anesthesia is used for patient comfort.

A short story about Warts, Are they contagious?