TY - CHAP M1 - Book, Section TI - Pneumothorax A1 - Estrada, Rodolfo A. A1 - Peters, Jay I. A1 - Soni, Nilam J. A1 - Ong, Philip G. A2 - Grippi, Michael A. A2 - Antin-Ozerkis, Danielle E. A2 - Dela Cruz, Charles S. A2 - Kotloff, Robert M. A2 - Kotton, Camille Nelson A2 - Pack, Allan I. PY - 2023 T2 - Fishman’s Pulmonary Diseases and Disorders, 6e AB - The abnormal presence of air in the pleural cavity, separating the visceral from the parietal pleura, is known as pneumothorax. Tra­ditionally, pneumothorax has been classified as having occurred spontaneously or as a result of trauma. Spontaneous pneumothorax can occur in a background of clinically normal lungs (primary spontaneous pneumothorax [PSP]) or in the setting of underlying lung disease (secondary spontaneous pneumothorax [SSP]). Since underlying anatomic lung abnormalities (subpleural blebs) are often identified in PSP,1–3 it is now believed that the majority of PSPs occur in the setting of occult lung disease. Nevertheless, this method of classification is still common in practice. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/03/29 UR - accessmedicine.mhmedical.com/content.aspx?aid=1195009047 ER -