Learn more about this condition that primarily affects young children and causes inflammation in the walls of the arteries throughout the body.
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
Lewy body dementia
This common dementia is caused by a buildup of proteins in the brain. It affects thinking, memory and movement.
Disease
Liver disease
The liver has a lot of vital tasks including ridding the body of toxins. Learn about problems that can affect the liver and how to avoid them.
Disease
Low sex drive in women
Many women have dips in sexual desire at some point. But you can get your sex drive back. Learn about the causes and treatments of lost libido in women.
Disease
Lyme disease
Learn about the symptoms, diagnosis and treatment of this common tick-borne illness.
Disease
MCAD deficiency
This inherited genetic disorder prevents the breakdown of certain fats needed for energy, leading to dangerously low blood sugar levels if not treated.
Disease
Mammary duct ectasia
Mammary duct ectasia is a noncancerous breast condition that affects the milk ducts. Learn the signs and symptoms and when treatment might be needed.
Disease
Meniere's disease
This chronic disorder affects balance and hearing, causing unpredictable episodes of dizziness and hearing problems.
Disease
Mitral valve disease
Learn more about diseases that affect the valve between the left heart chambers, including mitral valve regurgitation and mitral valve stenosis.
Disease
Mixed connective tissue disease
Mixed connective tissue disease has signs and symptoms of multiple disorders, making it difficult to diagnose. There's no cure, but medications can help.