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(A) Case no. 5 had multiple nodules in the left lower lobe on computed tomography. (B) Re-examination after three months revealed cavities (arrow) in this patient (upper panel). (C) HE staining revealed inflammatory granuloma accompanied by coagulative necrosis (lower left panel, ×40). (D) Inflammatory cells were observed in the blood vessels, around which massive lymphocyte infiltration occurred, indicating vasculitis formation (arrow, lower right panel, ×400).
