If air enters the pleural space either by a hole in the lung or the chest wall, the pressure in the pleural space equals the pressure outside the body. Thus, the vacuum is lost and the lung collapses. Spontaneous pneumothorax is caused by a rupture of a cyst or a small sac (bleb) on the surface of the lung.
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IRS spokesman Mark Hanson says that scammers are now able to spoof the caller ID and in some instances your phone will show an IRS number. But if you called the IRS, you'd discover that it was a scam. When in doubt, just call the real IRS at 1-800-829-1040. Then report the incident to the Treasury Department at 1-800-366-4484. One thing we are telling people is to try and recognize these scams up front so you don't fall into a trap, Hanson told me. That's getting harder all the time.