<unk>  is incomplete development of the lungs, resulting in an abnormally low number or size of bronchopulmonary segments or alveoli. A congenital malformation, it most often occurs secondary to other fetal abnormalities that interfere with normal development of the lungs. Primary (idiopathic)<unk>  is rare and usually not associated with other maternal or fetal abnormalities. Incidence of<unk>  ranges from 9–11 per 10,000 live births and 14 per 10,000 births.<unk>  is a relatively common cause of neonatal death. It also is a common finding in stillbirths, although not regarded as a cause of these.
Pulmonary hypoplasia
Alveolar capillary dysplasia
Renal hypoplasia
Tracheal agenesis
Pulmonary agenesis
Pulmonary atresia
Gastroschisis
Rachischisis