Conditions & Treatments


Obesity increases the risk for many diseases, especially heart disease, stroke, cancer, and diabetes.


Obsessive-compulsive disorder is an anxiety disorder in which a person has an unreasonable thought, fear, or worry that he or she tries to manage through a ritualized activity to reduce the anxiety.


Occupational asthma is a type of asthma caused by exposure to inhaled irritants in the workplace. Symptoms may disappear when the irritants that caused the asthma are avoided.


Repeated and long-term exposure to certain irritants on the job can lead to an array of lung diseases that may have lasting effects, even after exposure ceases.


An omphalocele is a birth defect, in which some of the abdominal organs protrude through an opening in the abdominal muscles in the area of the umbilical cord.


Oppositional defiant disorder (ODD) is a behavior disorder, usually diagnosed in childhood, that is characterized by uncooperative, defiant, negativistic, irritable, and annoying behaviors toward parents, peers, teachers, and other authority figures.


Oral cancer is cancer found in the oral cavity (the mouth area) and the oropharynx (the throat area at the back of the mouth).


Osteoarthritis is a chronic, degenerative, joint disease characterized by the breakdown of joint cartilage and adjacent bone in the neck, lower back, knees, hips and/or fingers.


Also called osteocartilaginous exostoses, osteochondroma is an overgrowth of cartilage and bone near the end of the bone near the growth plate.


Osteogenesis imperfecta (OI), also known as brittle-bone disease, is a genetic (inherited) disorder characterized by bones that break easily without a specific cause.


Osteomyelitis is an inflammation or swelling of bone tissue that is usually the result of an infection.


Osteoporosis, or porous bone, is a disease in which there is a loss of bone mass and destruction of bone tissue, causing weakening of the bones in the hips, spine and wrists.


Osteosarcoma is a type of bone cancer that develops in the osteoblast cells that form the outer covering of bone.


The following are other common bacterial skin infections: Erysipelas, Erythrasma, Impetigo, and Paronychia.


As a person grows older and is exposed to sunlight, the skin changes. Most people have some skin marks, such as freckles and moles, which may multiply or darken over time.


The following are some of the other common dermatitis conditions: localized scratch dermatitis, nummular dermatitis, perioral dermatitis, and stasis dermatitis.


An autoimmune disorder is any reaction or attack of a person's immune system against its own organs and tissues.


Kaposi's sarcoma is a skin cancer that starts in the skin's blood vessels. Kaposi's sarcoma comes in two forms: a slow-growing form, and a more aggressive, faster-spreading form.


Ovarian cancer is a disease in which malignant cells are found in an ovary. Ovarian Cancer and Hereditary Nonpolyposis Colon Cancer (HNPCC) The risk for ovarian cancer is increased with hereditary nonpolyposis colon cancer (HNPCC), an autosomal dominant cancer genetic syndrome.


The risk for ovarian cancer is increased with hereditary nonpolyposis colon cancer (HNPCC), an autosomal dominant cancer genetic syndrome.


When adrenal glands produce excessive amounts of certain hormones, they are called "overactive."