| Latex Allergy Symptoms of latex allergy include watery or itchy eyes, wheezing, hives, flushing or a skin rash, itching, or swelling. |
| Lymphedema Following a Mastectomy Whenever the normal drainage pattern in the lymph nodes is disturbed or damaged—often during surgery to remove the lymph nodes—the arm may swell. This swelling, caused by too much fluid, is called lymphedema. |
| Landau-Kleffner Syndrome Detailed information on Landau-Kleffner syndrome, including signs, diagnosis, and treatment |
| Laryngeal Cancer (Cancer of the Larynx) Detailed information on laryngeal cancer (cancer of the larynx), including symptoms, cause, risk factors, diagnosis, and treatment |
| Low-Vision Devices Low-vision devices are categorized as either optical or nonoptical. Optical devices are magnifying lenses or closed circuit TV. Nonoptical devices are large-print books and talking computers. |
| Lumbar Disk Disease (Herniated Disk) Lumbar disk disease is caused by a change in the structure of a spinal disk. Most of the time, disk disease is a result of aging and the degeneration that occurs within the disk. |
| Lateral Epicondylitis (Tennis Elbow) The pain of tennis elbow is caused by damage to the tendons that bend the wrist backward away from the palm. |
| Ligament Injuries to the Knee The anterior cruciate ligament (ACL) is one of the most common ligaments to be injured. Learn about the four major ligaments of the knee. |
| Li-Fraumeni Syndrome Li-Fraumeni syndrome raises the risk for breast cancer and many other types of cancer. |
| Liver Tumors Detailed information on liver tumors, including types, symptoms, staging, diagnosis, and treatment |