Health Library

Browse our Health Library to learn about treatments, conditions, and how Cedars-Sinai can support your healthcare needs.

Showing 1 - 30 of 32 results.
Obesity Hypoventilation Syndrome in Children

Obesity hypoventilation syndrome (OHS) is a breathing problem. It affects some children who are obese. Poor breathing causes too much carbon dioxide and too little oxygen in the blood. This is a rare but life-threatening issue. Your ...

Obesity in Teens

Obesity is when a teen has too much body fat. Obesity is a serious, long-term disease.

Obsessive-Compulsive Disorder (OCD)

Obsessive-compulsive disorder (OCD) is a common anxiety disorder. It causes unreasonable thoughts, fears, or worries. A person with OCD tries to manage these thoughts through rituals.

Obsessive-Compulsive Disorder (OCD) in Children

Obsessive-compulsive disorder (OCD) is a type of anxiety disorder. A child with OCD has obsessive thoughts that are not wanted. They are linked to fears, such as touching dirty objects.

Obstructive Sleep Apnea

Obstructive sleep apnea occurs when your breathing stops briefly during sleep. This can occur when something is blocking your airway. The stopped breathing can occur many times a night causing snoring, and daytime fatigue.

Obstructive Sleep Apnea in Children

Obstructive sleep apnea is when a child briefly stops breathing while sleeping. It happens because of a blockage in the upper airway. The pause in breathing may occur many times in a night, disrupting the child’s sleep.

Occupational Asthma

You may get occupational asthma by breathing in irritants at work. It is often reversible. The symptoms may go away when you avoid the irritants. But, long term exposure can cause lasting damage.

Occupational Lung Diseases

Occupational lung diseases are lung problems that are made worse in certain work environments. They are caused by long-term exposure to certain irritants that are breathed into the lungs. These lung diseases may have lasting effects, ...

Oculopharyngeal Muscular Dystrophy (OPMD)

Oculopharyngeal muscular dystrophy (OPMD) is a rare genetic condition. It causes weakness in the muscles around the upper eyelids and part of the throat called the pharynx. The condition may harm vision and cause problems swallowing and ...

Oligodendroglioma in Children

The brain is part of the central nervous system (CNS). The CNS also includes the spinal cord. A tumor is an abnormal growth of tissue. An oligodendroglioma is a type of CNS tumor called a glioma.

Oligohydramnios

In this condition, there is too little amniotic fluid around your baby during pregnancy. It occurs in only about 4% of pregnancies.

Omphalocele

An omphalocele is a birth defect. It happens when your baby is forming during pregnancy. In this condition, some of your baby’s abdominal organs poke out (protrude) through an opening in the abdominal muscles. This area is in the ...

Open Neural Tube Defects (ONTDs) in Children

Open neural tube defects (ONTDs) are problems with the way the brain, spinal cord, or spine forms while a baby is growing in the mother's uterus.

Oppositional Defiant Disorder (ODD) in Children

Oppositional defiant disorder (ODD) is a type of behavior disorder. It is mostly diagnosed in childhood. Children with ODD are uncooperative, defiant, and hostile toward peers, parents, teachers, and other authority figures.

Optic Neuritis

Optic neuritis is a condition that affects the eye and your vision. It occurs when the optic nerve is inflamed.

Optic Neuritis

Optic neuritis is a condition that affects the eye and your vision. It occurs when the optic nerve is inflamed.

Oral Hairy Leukoplakia

Oral hairy leukoplakia is a condition that the Epstein-Barr virus (EBV) can trigger. The condition causes white lesions, or patches, on your tongue. Sometimes the lesions happen in other areas of your mouth. The patches may be hairy in ...

Osgood-Schlatter Disease in Children

Osgood-Schlatter disease is an overuse condition in children. It’s when the tendon in a knee becomes injured and inflamed.

Osteoarthritis

Osteoarthritis is the most common form of arthritis. It is a chronic degenerative joint disease that affects mostly middle-aged and older adults. Osteoarthritis causes the breakdown of joint cartilage. It can occur in any joint, but it ...

Osteochondroma

Osteochondroma is an overgrowth of cartilage and bone at the end of the bone near the growth plate. Most often, it affects the long bones in the leg, the pelvis, or the shoulder blade.

Osteogenesis Imperfecta in Children

Osteogenesis imperfecta (OI) is an inherited (genetic) bone disorder that is present at birth. It is also known as brittle bone disease. A child born with OI may have soft bones that break (fracture) easily, bones that are not formed ...

Osteoid Osteoma

An osteoid osteoma is a type of bone tumor. It is not cancer (benign). It remains in the same place it starts. It will not spread to other bones or parts of your body.

Osteomyelitis

Osteomyelitis is an inflammation or swelling of bone tissue. It’s most often caused by an infection. Bone infection may occur for many reasons and can affect children or adults.

Osteomyelitis in Children

Acute osteomyelitis is an infection in the bone. It develops over a short time, usually about 2 weeks. In children, osteomyelitis is more common in the long bones of the arms and legs. But it can affect any bone in the body. ...

Osteoporosis

Osteoporosis is a disease that causes weak, thinning bones. This leaves the bones at greater risk of breaking. The bones most often affected are the hips, spine, and wrists.

Osteosarcoma (Osteogenic Sarcoma) in Children

Osteosarcoma is cancer of the bone. The cancer (malignant) cells make immature bone cells (osteoid). Osteosarcoma is rare, but it is the most common type of bone cancer in children and teens. It is most common when teens have growth ...

Otitis Media (Middle Ear Infection) in Adults

Otitis media is infection or inflammation in the middle ear. Most kids have at least one ear infection by the time they are 3 years old. But, adults can also get ear infections.

Ovarian Cyst

An ovarian cyst is a fluid-filled sac that forms on or inside an ovary. Most women will not need treatment. In some cases, you may need surgery to remove part or all of your ovary.

Overactive Adrenal Glands

Your body has 2 adrenal glands. They are found on top of each kidney. The adrenal glands make certain types of hormones. If they make too much of (overproduce) these hormones, they are called overactive.

Overactive Adrenal Glands in Children

Adrenal glands make a series of hormones. The hormones are androgens, corticosteroids, and aldosterone. Overactive adrenal glands make too much of one or more of these hormones. This can cause health problems. The health problems vary ...

Showing 1 - 30 of 32 results.
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