由于有支气管动脉供血维持组织活性，故坏死较少见。
Necrosis is relatively uncommon because tissue viability is maintained by the bronchial arterial blood supply.
在肿块型3例4个肿块中，支气管充气征3个，伴不规则坏死空洞2个；
Of the 4 mass-type foci in 3 cases, 3 had air bronchogram sign and 2 had irregular necrosis cavities.
当存在广泛的干酪性坏死并且肉芽肿累及较大的支气管时，大量的坏死物排出，留下空洞。
When there is extensive caseation and the granulomas involve a larger bronchus, it is possible for much of the soft, necrotic center to drain out and leave behind a cavity.
肺部虽未找到细菌，但发现有明显的病变存在，如细支气管的微绒毛脱落，并可见坏死区。
Although the bacteria were not detected in lung, the pathologic changes were obvious such as abruption of microvilli from bronchiole and the necrosis area in lung.
不同浓度羰基镍染毒大鼠肺组织有炎性渗出和增生，部分细支气管破坏，黏膜坏死脱落；
The inflammatory infiltration and hyperplasia in lung tissue, bronchiolar damage and the bronchial mucosa defulvium appeared in the rats exposed to carbonyl nickel.
不同浓度羰基镍染毒大鼠肺组织有炎性渗出和增生，部分细支气管破坏，黏膜坏死脱落；
The inflammatory infiltration and hyperplasia in lung tissue, bronchiolar damage and the bronchial mucosa defulvium appeared in the rats exposed to carbonyl nickel.
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