The fourth stage of fibrosis was only seen in lymph nodes of a case with complicated CWP. In this case the necrotic materials of lymph nodes eroded adjacent bronchi and vessels, and coalesced with progressive massive fibrosis (PMF).

• 1例复杂型CWP的淋巴结累及邻近的支气管和血管 ,并与肺内进行性大块纤维化 (progressivemassivefibrosis ,PMF)融合。