Pulmonary Emphysema is related to alpha-1-antitrypsin deficiency and bronchopulmonary dysplasia, and has symptoms including coughing, hemoptysis and snoring. An important gene associated with Pulmonary Emphysema is SERPINA1 (Serpin Family A Member 1), and among its related pathways/superpathways are Innate Immune System and Collagen chain trimerization. The drugs Doxycycline and Simvastatin have been mentioned in the context of this disorder. Affiliated tissues include bone marrow and lung, and related phenotypes are homeostasis/metabolism and neoplasm