“…4 Of these previous cases of PG with pulmonary involvement, only 16 had lung biopsies performed. [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] Histopathologic findings from the lung biopsies showed a spectrum of changes, including palisading granulomas around foci of necrosis, mixed inflammatory infiltration (ie, various combinations of lymphocytes, monocytes, histiocytes, and neutrophils), multifocal neutrophilic abscesses, intra-alveolar neutrophilic infiltrate, focal vasculitis, and fibrosis or necrosis of lung parenchyma. [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] In the case described herein, the core needle biopsy of the lung nodule also revealed similar findings, which included parenchymal necrosis, mixed inflammation, and focal vasculitis.…”