Second Opinion with Joan Lunden - Season 10

Melanoma is the most dangerous form of skin cancer, these cancerous growths develop when unrepaired DNA damage to skin cells triggers genetic defects that lead the skin cells to multiply rapidly and form malignant tumors.

A concussion is a type of traumatic brain injury, or TBI, caused by a bump, blow, or jolt to the head that can change the way your brain normally works.

Pertussis (whooping cough) can cause serious illness in infants, children and adults. The disease usually starts with cold-like symptoms and maybe a mild cough or fever.

Food allergies are a growing food safety and public health concern that affect an estimated 4%–6% of children in the United States. Allergic reactions can be life threatening and have far-reaching effects on children and their families.

Teen depression is a serious medical problem that causes a persistent feeling of sadness and loss of interest in activities. It affects how your teen thinks, feels and behaves, and it can cause emotional, functional and physical problems.

Complications of pregnancy are health problems that occur during pregnancy. They can involve the mother's health, the baby's health, or both.

Some call it hypertension. Others know it as high blood pressure. Whichever term you use, it is the same serious health problem - one that increases your risk for heart disease and stroke and can also contribute to heart failure , kidney disease, vision problems, and other conditions.

Clostridium Difficile is a bacterium that causes inflammation of the colon. People who have other illnesses or conditions requiring prolonged use of antibiotics, and the elderly, are at greater risk of acquiring this disease.

Bob Hatch struggles to manage his diabetes; curing Type 2 diabetes; five lifestyle changes that could help manage diabetes.

Coronary artery disease occurs when a substance called plaque builds up in the arteries that supply blood to the heart. You can help prevent heart disease by making healthy choices and managing any medical conditions you may have.