Pulmonary Hypoplasia, Primary, also known as primary pulmonary hypoplasia, is related to pulmonary hypoplasia, familial primary and tracheal stenosis. An important gene associated with Pulmonary Hypoplasia, Primary is FGF10 (Fibroblast Growth Factor 10). Affiliated tissues include lung and trachea, and related phenotypes are pulmonary hypoplasia and neonatal respiratory distress