Spontaneous pneumothorax is a condition related to the rupture of subpleural blebs. The development of which is strongly associated with smoking. Chest pain and dyspnea are frequent symptoms and usually start with the patient at rest, unrelated to acute traumatic mechanisms.

Contributed by Dr. Hemilianna Hadassa Silva Matozinho M.D. and Dr. Arthemizio Antônio Lopes Rocha M.D.