虽然结节病很少见真性空洞，但是可有肺大泡的假空洞及广泛纤维化形成的支气管扩张。
Even though true cavitary sarcoidosis is rare, pseudocavities representing bullae or bronchiectasis are common in patients with extensive fibrosis.
目的对气管假体的基础与临床应用研究进展进行综述。
Objective To review the recent research progress of base and clinical application of tracheal replacement.
但少数由于假腆延及气管、支气管。
But minority, because the vacation thrusts out involves the trachea, the bronchial tube.
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