A 74-year-old man presents to the emergency department with a 1-day history of severe chest and back pain. He has a history of hypertension and has run out of medication. He has no history of similar ...

Over 120 years ago, Henry Ernest Dudeney posed the famous dissection problem of transforming a triangle into a square by cutting it into as few pieces as possible. In a new study, researchers have ...

What Is an Aortic Dissection? An aortic dissection is an emergency with your aorta, which is the largest blood vessel in your body and the main artery that takes blood from your heart to the rest of ...

It's been over 20 years since John Ritter's death, but his wife is more determined than ever to honor his memory. John Ritter's wife, Amy Yasbeck, an actor and author, has made it her mission to raise ...

An aortic aneurysm occurs when a weak aortic wall stretches, causing it to bulge. An aortic dissection occurs when there’s a tear in the aortic wall, which can be fatal if not treated immediately. The ...

A coronary artery dissection is a serious heart condition that requires emergency treatment. This condition happens when one of the arteries in the heart develops a tear in its inner lining — one of ...

Lymph node dissections, or lymphadenectomies, are surgical procedures that play an important role in cancer treatments. A healthcare professional will remove the lymph nodes and check a tissue sample ...

Whether your subject is human anatomy, the life cycle of a chicken, or fruit fly genetics, students today have cleaner, safer, and more advanced models for biological discovery than ever before.

An aortic dissection happens when tears appear in the inner lining of the aorta, which is the main artery leaving the heart. Blood surges into the tears, causing the aorta lining to split, or dissect.