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Disease

Left ventricular hypertrophy

Learn more about this heart condition that causes the walls of the heart's main pumping chamber to become enlarged and thickened.
Disease

Legg-Calve-Perthes disease

This childhood condition occurs when blood supply to the ball part of the hip joint is interrupted for a short time, making the bone fracture easily and heal poorly.
Disease

Legionnaires' disease

Bacteria that can live in water from air conditioning systems, showers and spas cause this severe form of pneumonia.
Disease

Leiomyosarcoma

Learn about this rare cancer that begins in smooth muscle tissue. Treatments include surgery, radiation therapy and chemotherapy.
Disease

Leukemia

Learn about this cancer that forms in the blood and bone marrow.
Disease

Leukoplakia

This mouth condition appears as thick, white patches on the gums, the cheeks and the bottom of the mouth that cannot be scraped off.
Disease

Lewy body dementia

This common dementia is caused by a buildup of proteins in the brain. It affects thinking, memory and movement.
Disease

Lice

Learn how to get rid of these tiny, wingless insects and keep them from coming back.
Disease

Lichen planus

Learn about the causes, symptoms and treatment of this condition that causes swelling and irritation in the skin, hair, nails, mouth and vagina.
Disease

Lichen sclerosus

Learn more about the causes, symptoms, complications, treatment and self-care tips for this blotchy skin condition that affects the genital and anal areas.
Disease

Lip cancer

Lip cancer often appears as a sore on your lip that doesn't heal. Learn about lip cancer treatments, including surgery, radiation and chemotherapy.
Disease

Lipoma

This slow-growing, fatty lump most often is just below the skin. It isn't cancer and is typically harmless.

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