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Osteogenesis Imperfecta in Children What is osteogenesis imperfecta in children? Osteogenesis imperfecta (OI) is a rare inherited (genetic) bone disorder that is present at birth. It's also known as brittle bone disease. A child born with OI may have soft bones that break

Common Breast Conditions Click on the links below to learn about common breast conditions. Mastalgia (Breast Pain) Common Benign Lumps Fibrocystic Breast Changes Nipple Problems and Discharge Breast Infections and Inflammations Diagnosing Benign Breast Conditions© 2000-2025 The

About Cancer Clinical Trials What are cancer clinical trials? Cancer clinical trials are research studies with people. They may be done by government agencies, educational organizations, private not-for-profit groups, or commercial businesses. Trials are used to check how safe

Topic Index Anatomy of the Breasts Normal Breast Development Breast Health: Three-Step Plan for Preventive Care Common Breast Conditions Breast Cancer About Breast Cancer in Men Routine care is the best way to keep you and your breasts healthy. Click on the links above to learn

Mammograms and Breast Health What is a mammogram? A mammogram is an X-ray image of your breast. It's used to find and diagnose breast disease. A mammogram may be done if you have breast problems such as a lump, pain, or nipple discharge. A mammogram is also done as a screening

Smoking and Heart Disease The American Heart Association (AHA) says diseases caused by smoking kill more than 440,000 people in the U.S. each year. Most new smokers are children and teens. Smokers have a higher risk for lung disease and other respiratory problems, such as

Acne What is acne? Acne is a disorder of the hair follicles and oil glands (sebaceous glands). The oil glands secrete oils (sebum) to keep the skin moist. When the glands get clogged, it can lead to pimples and cysts. Acne is very common. People of all races and ages have acne

Contact Dermatitis What is contact dermatitis? Contact dermatitis is a reaction that happens after your skin comes in direct contact with certain substances. The substances may be: Irritants. These cause direct skin irritation and inflammation. They are the most common cause of

Benign Skin Growths What are benign skin growths? Skin changes as you grow older and are exposed to sunlight, health conditions, trauma, and other environmental changes. Most people have some skin marks, such as freckles and moles. These may multiply or darken over time. Benign

Psoriasis What is psoriasis? Psoriasis is a long-term (chronic) skin condition. It causes inflamed, red, raised areas of skin (plaques). The plaques itch and can be painful. The condition most often occurs on the scalp, elbows, knees, and lower back. What causes psoriasis