TY - JOUR T1 - Detection of <em>C. acnes</em> in granulomas of patients with either hypersensitivity pneumonitis or vasculitis reveals that its presence is not unique for sarcoidosis JF - ERJ Open Research JO - erjor DO - 10.1183/23120541.00930-2020 SP - 00930-2020 AU - Els Beijer AU - Kees Seldenrijk AU - Bob Meek AU - Jan Damen AU - Marian J. R. Quanjel AU - Jan C. Grutters AU - Marcel Veltkamp Y1 - 2021/01/01 UR - http://openres.ersjournals.com/content/early/2021/02/04/23120541.00930-2020.abstract N2 - Granulomas are compact organised structures of different immune cells including macrophages, lymphocytes and plasma cells, thought to be formed when (foreign) antigens cannot be cleared. The differential diagnosis of a granulomatous lesion is broad and includes infectious aetiologies, malignancy and inflammatory disorders like vasculitis, hypersensitivity pneumonitis and sarcoidosis [1].FootnotesThis manuscript has recently been accepted for publication in the ERJ Open Research. It is published here in its accepted form prior to copyediting and typesetting by our production team. After these production processes are complete and the authors have approved the resulting proofs, the article will move to the latest issue of the ERJOR online. Please open or download the PDF to view this article.Conflicts of interest: Dr. Veltkamp has nothing to disclose.Conflicts of interest: Dr. Quanjel has nothing to disclose.Conflicts of interest: Dr. Seldenrijk has nothing to disclose.Conflicts of interest: Dr. Grutters has nothing to disclose.Conflicts of interest: Dr. Damen has nothing to disclose.Conflicts of interest: Ms Beijer has nothing to disclose.Conflicts of interest: Dr. Meek has nothing to disclose. ER -