Health Library

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

Showing 1 - 30 of 39 results.
Rabies in Children

Rabies is a viral infection that attacks the nervous system. Once symptoms develop, it is often fatal. But a rabies vaccine, or a series of vaccines, given soon after contact with an animal infected with rabies can prevent the illness.

Radiation Exposure from X-rays in Children

X-rays are a kind of imaging test that provides your healthcare provider with information about structures inside the body. These tests expose children to low doses of radiation.

Rathke Cleft Cysts

Rathke cleft cysts are non-cancerous fluid-filled growths that develop between the parts of the pituitary gland at the base of the brain. They develop while a fetus is growing in the womb. A Rathke cleft cyst develops from a piece of the...

Raynaud's Phenomenon

Raynaud's phenomenon is a disorder that causes decreased blood flow to the fingers. In some cases, it also causes less blood flow to the ears, toes, nipples, knees, or nose. This happens due to spasms of blood vessels in those areas. The...

Reactive Arthritis (Reiter's Syndrome)

Reactive arthritis is a type of arthritis that occurs due to an infection. Arthritis is when joints become inflamed and painful. Reactive arthritis is not contagious. It's also known as Reiter's Syndrome. It mostly affects men ages 20 to...

Refractory Epilepsy

Some people with epilepsy will have or eventually develop refractory epilepsy. This means that medicines don't work well, or at all, to control the seizures.

Relapsing-Remitting Multiple Sclerosis

Relapsing-remitting multiple sclerosis (MS) is a type of multiple sclerosis characterized by flare-ups with periods of remission in between. Most people diagnosed with MS start off with this type.

Renal Vascular Disease

Renal vascular disease affects the blood flow into and out of the kidneys. It may cause kidney damage, kidney failure, and high blood pressure.

Respiratory Distress Syndrome (RDS) in Premature Babies

Respiratory distress syndrome (RDS) is a common problem in premature babies. It causes babies to need extra oxygen and help with breathing.

Respiratory Syncytial Virus (RSV) in Children

RSV is a viral illness that causes symptoms such as trouble breathing. It’s the most common cause of inflammation of the small airways in the lungs (bronchiolitis) and pneumonia in babies.

Restless Legs Syndrome (RLS)

Restless legs syndrome is a sleep disorder that causes creepy, crawly feelings in your legs. This often happens when you are trying to go to sleep or have been sitting for a long time.

Restrictive Cardiomyopathy

Restrictive cardiomyopathy, or RCM, is when the chambers of the heart become stiffer over time. Though the heart is able to squeeze well, it is not able to relax between beats normally. This makes it harder for the heart to fill with ...

Retinitis Pigmentosa

Retinitis pigmentosa is the name of a group of eye diseases that are passed down in families. All the diseases involve the eye’s retina. The retina is the nerve layer that lines the back of the eye that is sensitive to light. All the ...

Retinoblastoma in Children

Retinoblastoma is a rare cancer of the retina of the eye. The retina is in the back of the eye. It’s the part of the eye that receives light. Retinoblastoma is the most common tumor affecting the eye in children. It almost always occurs ...

Retinopathy of Prematurity

Retinopathy of prematurity is an eye problem that happens to premature babies. The retina lines the back of the eye. It receives light as it comes through the pupil. From there, the optic nerve sends signals to the brain. Retinopathy of ...

Revision Hip Surgery

When a replacement joint wears out, loosens or develops a problem, it can be resurfaced or replaced in a joint revision operation. Using regular X-ray examinations, the orthopedic surgeon can detect and monitor any changes, and plan for ...

Reye Syndrome in Children

Reye syndrome is a rare but very serious illness that causes brain swelling and liver damage. It can also affect all of the body’s organs.

Rh Disease

Rh disease occurs during pregnancy. It happens when the Rh factors in the mom’s and baby’s blood don’t match. It may also happen if the mom and baby have different blood types.

Rhabdomyosarcoma in Children

Rhabdomyosarcoma is a type of cancer. It starts in cells that grow into skeletal muscle cells. The cells are called rhabdomyoblasts. Skeletal muscles control all of a person’s voluntary muscle movements. The cancer is most common in ...

Rheumatic Fever

Rheumatic fever is a complex disease that affects the joints, skin, heart, blood vessels, and brain. It occurs mainly in children between the ages of 5 to 15.

Rheumatic Fever

Rheumatic fever is a complication of a strep throat. About three people out of every 10 who have a strep throat infection develop rheumatic fever. One common and potentially dangerous effect of rheumatic fever is damage to the valves of ...

Rheumatic Heart Disease

Rheumatic heart disease is a condition in which the heart valves have been permanently damaged by rheumatic fever. The heart valve damage starts with an untreated or under-treated strep infection. In some cases, strep throat or scarlet ...

Rheumatic Heart Disease in Children

Rheumatic heart disease is a condition that causes permanent damage to the heart valves.

Rheumatoid Arthritis

Rheumatoid arthritis (RA) is a long-term (chronic) disease that causes inflammation of the joints. The inflammation can be so severe that it affects how the joints and other parts of the body look and function.

Rheumatoid Vasculitis

Rheumatoid vasculitis is a condition that causes blood vessels to be inflamed. It happens in some people who have had rheumatoid arthritis (RA) for a long time.

Rhinitis

Rhinitis is a reaction that happens in the eyes, nose, and throat when allergens in the air trigger the release of histamine in the body. Histamine causes itching, swelling, and fluid to build up in the fragile linings of nasal passages,...

Right Bundle Branch Block

Right bundle branch block comes from a problem with the heart’s ability to send electrical signals. It usually doesn’t cause symptoms unless you have some other heart condition.

Ringworm in Children

Ringworm is a type of skin infection cause by a fungus. It looks like a red skin rash that forms a ring around normal-looking skin. Ringworm can be of several types.

Risks of Bariatric Surgery: Anemia

Anemia is when your blood has lower levels of red blood cells, or your red blood cells don’t have enough of the protein hemoglobin. the protein hemoglobin. Hemoglobin carries oxygen, which is sent around the body through blood. Anemia ...

Rocky Mountain Spotted Fever (RMSF) in Children

Rocky Mountain spotted fever (RMSF) is a bacterial infection. It’s spread by the bite of an infected tick.

Showing 1 - 30 of 39 results.
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