Of the 4 mass-type foci in 3 cases, 3 had air bronchogram sign and 2 had irregular necrosis cavities.

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；

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Of the 4 mass-type foci in 3 cases, 3 had air bronchogram sign and 2 had irregular necrosis cavities.

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；

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