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Title: Propionibacterium acnes-associated sarcoidosis complicated by acute bird-related hypersensitivity pneumonitis. Author: Sawahata M, Sakamoto N, Yamasawa H, Iijima Y, Kawata H, Yamaguchi T, Uchida K, Eishi Y, Bando M, Hagiwara K. Journal: BMC Pulm Med; 2020 Nov 07; 20(1):288. PubMed ID: 33160347. Abstract: BACKGROUND: The number of reports on sarcoidosis complicated by hypersensitivity pneumonitis (HP) is limited, and most describe cases complicated by chronic bird-related HP. Here, we present for the first time a case with Propionibacterium acnes-associated sarcoidosis complicated by acute bird-related HP. CASE PRESENTATION: A 62-year-old man with a past medical history of sarcoidosis was admitted to our department, and chest computed tomography showed diffuse ground-glass opacities, which appeared as he rapidly increased the number of pigeons he kept for a competition. Random transbronchial lung biopsy revealed well-formed non-caseating epithelioid granulomas, which contained positively stained substances on immunohistochemistry using the PAB antibody, a specific monoclonal antibody against P. acnes lipoteichoic acid. Poorly formed non-caseating granulomas without positively stained substances were also detected. CONCLUSION: We describe the successful identification of this exceptionally rare case of sarcoidosis complicated by acute bird-related HP in which two morphologically and immunohistologically different types of granulomas were present in the same lung.[Abstract] [Full Text] [Related] [New Search]