Lymphangiomatosis is a rare disorder that is believed to be congenital (people are born with it) and can affect any of the body's systems except the central nervous system (including the brain). It is a disease of the lymphatic system, which is a network that is linked throughout all areas of the body except the central nervous system. Lymphangiomatosis can affect anyone at any age, but it is most commonly diagnosed in children and almost always before age 20.

The American Lung Association's information about lymphangiomatosis focuses on the disease's effects on the chest and lungs. After you read through Understanding Lymphangiomatosis, and our information about Symptoms, Diagnosis and Treatment, see In-Depth Resources for links to information about how the disease can affect other parts of the body.