types of cystic fibrosis
URL of this page: //medlineplus.gov/ency/article/000107.htm. Cystic fibrosis is a disease that causes thick, sticky mucus to build up in the lungs, digestive tract, and other areas of the body. It is one of the most common chronic lung diseases in children and young adults. It is a life-threatening disorder. Cystic fibrosis (CF) is a disease that is passed down through families.