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

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AA Amyloidosis

AA Amyloidosis is caused by the accumulation of Serum Amyloid A protein into amyloid fibrils causing organ dysfunction.

Abdominal Angiogram

An angiogram is an imaging test that uses X-rays to look at your blood vessels. An abdominal angiogram looks at the blood vessels in your belly (abdomen). It may be used to check blood flow to the organs of the abdomen, such as the liver...

Abdominal Aortic Aneurysm

Detailed information on abdominal aortic aneurysms, including description of abdominal aortic aneurysm, causes, symptoms, diagnosis, treatment, and full-color anatomical and procedure illustrations

Abdominal Aortic Aneurysm Repair

Abdominal aortic aneurysm (AAA) repair is done to treat an aneurysm. An aneurysm is a bulging, weak spot in the aorta that may be at risk for rupturing. In this case, the aneurysm is in part of the aorta that is in the abdomen.

Abdominal Pain - Unexplained

Pain and other abdominal symptoms can signal any number of problems. These range from indigestion to cancer.

Abdominal Ultrasound

An abdominal ultrasound is an imaging test used to assess the organs and structures in the belly.

Abdominal X-ray

X-rays use beams of energy that pass through body tissues onto a special film and make a picture. They show pictures of your internal tissues, bones, and organs. Bone and metal show up as white on X-rays. X-rays of the belly may be done ...

Accelerated Partial Breast Irradiation

Women diagnosed with early-stage breast cancer who have a lumpectomy may require radiation therapy to lower the risk of recurrence. One type of radiation therapy we offer at the cancer institute is accelerated partial breast irradiation....

Acetabular Fracture

The hip joint is a ball and socket joint. The socket part is lined with smooth cartilage and is called the acetabulum, which is part of the pelvis. When the socket is fractured, it is called an acetabular fracture. Such fractures are far...


Achalasia is a disease that makes it hard to eat and drink normally. It affects your esophagus, which is the swallowing tube that connects the back of your throat to your stomach.

Achalasia in Children

Achalasia is a rare disease that makes it hard to swallow foods and liquids. In achalasia, there is a problem with the tube that carries food from the mouth to the stomach (esophagus).

Achilles Tendon Injuries

Achilles tendon injuries affect the Achilles tendon, a fibrous band of tissue that links the muscles in your calf to your heel. The strength and flexibility of this tendon are important for jumping, running, and walking.

Achilles Tendon Repair Surgery

Achilles tendon repair surgery is a type of surgery to fix a damaged Achilles tendon. This is the strong, fibrous cord in the lower leg that connects the muscles of your calf to your heel. It's the largest tendon in your body.

Achondroplasia in Children

Achondroplasia is a group of rare genetic (inherited) bone disorders. Achondroplasia is the most common type of what was once called dwarfism, in which the child's arms and legs are short in proportion to body length.

Achondroplastic Dwarfism

Achondroplastic dwarfism is the most common form of short-limbed dwarfism. People with this disorder do not grow to what are considered normal heights and average about four feet tall. Usually, the forehead is large, and the middle part ...


Acne affects teens and adults of all ages. It happens when oil secreted by sebaceous glands clogs the hair follicle. Bacteria infect the clogged follicle and cause pimples.

Acne in Children

Acne is a disorder of the hair follicles and sebaceous glands. Hair follicles are the areas around the base or root of each hair. Sebaceous glands are the tiny glands that release oil (sebum) into the hair follicles. The sebum moistens ...

Acoustic Neuroma

Acoustic neuroma is a rare noncancer tumor. It affects hearing and balance when the tumor presses on the nerves in the inner ear.

Acquired Hemophagocytic Lymphohistiocytosis (HLH)

If you have hemophagocytic lymphohistiocytosis, your immune system does not work normally. Certain white blood cells - histiocytes and lymphocytes - attack your other blood cells. These abnormal blood cells accumulate in your spleen and ...

Acquired Hypothyroidism in Children

Hypothyroidism is when the thyroid gland doesn't make enough thyroid hormone. The condition is more common in adults. But it’s the most common thyroid disorder in children. Not enough thyroid hormone leads to signs such as slow growth, ...

Acquired Hypothyroidism in Children

Hypothyroidism is when the thyroid gland doesn't make enough thyroid hormone. The condition is more common in adults. But it’s the most common thyroid disorder in children. Not enough thyroid hormone leads to signs such as slow growth, ...


Acromegaly is abnormal growth that occurs when an adult's pituitary gland makes too much growth hormone. The abnormal growth starts in your hands and feet, as soft tissue begins to swell. This rare disease affects mostly middle-aged ...

Actinic Keratosis

Detailed information on actinic keratosis, including causes and treatment.

Active Surveillance for Prostate Cancer

One of the newest paradigms in prostate cancer care is to monitor eligible patients, those with low-grade prostate cancer, through an active surveillance program. Active surveillance is the merging of watchful waiting and active ...

Acute Aortic Syndrome

Acute aortic syndrome is a variety of acute painful and potentially life-threatening aortic pathologies that require immediate medical attention. Acute aortic syndrome includes aortic dissection, aortic ulcer, intramural hematoma and ...

Acute Bacterial Rhinosinusitis

Acute bacterial rhinosinusitis (ABRS) is an infection of both your nasal cavity and sinuses. It is caused by bacteria. Here's what you need to know about this condition.

Acute Bronchitis in Children

Bronchitis is an inflammation of the large breathing tubes (bronchi) in the lungs. Short-term (acute) bronchitis means that the symptoms often develop quickly and don't last long.

Acute Fatty Liver of Pregnancy

AFLP is a rare, but serious, liver problem in pregnancy. With AFLP the liver cells have too much fat, which can damage the liver.

Acute Liver Failure

Acute liver failure is when your liver suddenly starts to not work. This often happens right after an overdose of medicine or poisoning.

Acute Lymphocytic Leukemia (ALL): Overview

Leukemia is cancer that starts in the bone marrow. When a person has leukemia, the body makes too many abnormal blood cells. Learn more about symptoms, diagnosis, and treatments.

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