TOPICS: Spontaneous pneumothorax, primary spontaneous pneumothorax, smokers, secondary spontaneous pneumothorax, COPD, emphysema, PEEP, Marfan syndrome, sarcoidosis, scuba diving, catamenial pneumothorax, apical subpleural bleb, cyst, bullae, tracheal deviation, acquired pneumothorax, traumatic pneumothorax, blunt or closed, penetrating or open, iatrogenic pneumothorax, needle related, tube related, tension pneumothorax, compression atelectasis, obstructive shock, pleuritic chest pain, tactile fremitus, pulsus paradoxus, Beck's triad, needle decompression, chest tube placement