section_path: Clinical significance/Congenital disorders
section_name: Congenital disorders
paragraph_text: Congenital disorders
  
  Congenital disorders include cystic fibrosis, pulmonary hypoplasia (an incomplete development of the lungs) congenital diaphragmatic hernia, and infant respiratory distress syndrome caused by a deficiency in lung surfactant. An azygos lobe is a congenital anatomical variation which though usually without effect can cause problems in thoracoscopic procedures.