Browse our Health Library to learn about treatments, conditions, and how Cedars-Sinai can support your healthcare needs.
Labyrinthitis is the inflammation of part of the inner ear called the labyrinth. The inflammation causes vertigo, hearing loss, and other symptoms.
Lactose intolerance is when your body can’t break down or digest lactose. Lactose is a sugar found in milk and milk products. Lactose intolerance happens when your small intestine does not make enough of a digestive enzyme called ...
Lactose intolerance is when the body can’t easily break down or digest lactose. Lactose is a sugar found in milk and milk products.
Lambert-Eaton syndrome is an autoimmune disorder affecting the areas where nerves and muscles connect. It causes weak muscles, trouble walking, and other symptoms.
Detailed information on Landau-Kleffner syndrome, including signs, diagnosis, and treatment
A language disorder in a child means he or she has trouble understanding words that he or she hears and reads. Or the child has trouble speaking with others and expressing thoughts and feelings.
Large for gestational age is used to describe newborn babies who weigh more than the usual amount for the number of weeks of pregnancy. Babies are called large for gestational age if they weigh more than 9 in 10 babies of the same ...
Laryngeal cancer starts in the voice box (larynx), which is located in your neck. Learn more about symptoms, diagnosis, and treatments.
Tears to the lateral collateral ligament most often occur from a direct blow to the inside of the knee. This can stretch the ligaments on the outside of the near too far and may cause them to tear. This type of injury occurs in sports. ...
Symptoms of latex allergy include watery or itchy eyes, wheezing, hives, flushing or a skin rash, itching, or swelling.
Detailed information on lead poisoning
A learning disorder is when a child has trouble learning in certain school subjects. Your child may have problems with reading, math, or writing. Here's what you need to know, and how to help.
In left bundle branch block, there is a problem with the left branch of the electrical conduction system. The electrical signal can't travel down this path the way it normally would. The signal still gets to the left ventricle, but it is...
Diseases & Conditions
Legg-Calvé-Perthes disease (or Perthes disease) is a rare hip condition that affects children.
Leukemia is cancer of the blood. It’s the most common form of cancer in childhood. The cancer cells grow in bone marrow and go into the blood.
Lichen planus is a common disease that causes inflammation (swelling and irritation) on your skin or inside your mouth. On your skin, lichen planus causes a rash that is usually itchy. Inside your mouth, it may cause burning or soreness.
Lichen sclerosus is a long-term (chronic) skin condition. It causes the skin to become thin, white, and wrinkly.
A liposarcoma is a rare type of cancer that develops in your fatty tissue. This type of tumor can grow anywhere in your body. Common places include your abdomen, thigh, and behind your knee.
A Lisfranc joint injury is a type of injury to the bones or ligaments in the middle part of your foot. In this type of injury, there also is usually damage to the cartilage covering these bones.
Liver cancer is cancer that starts in your liver. There are different kinds of liver cancer, but the most common type in adults is called hepatocellular carcinoma. Learn more about symptoms, diagnosis, and treatments.
Long QT syndrome can cause life threatening rapid heart rhythms that can lead to fainting or sudden death.
Lordosis is a deformity of the backbone (spine). It's when the bones of the spine (vertebrae) in the lower back curve inward more than normal.