{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,24]],"date-time":"2025-11-24T02:06:18Z","timestamp":1763949978223,"version":"3.45.0"},"reference-count":18,"publisher":"BMJ","issue":"11","content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["BMJ Case Rep"],"accepted":{"date-parts":[[2025,11,7]]},"published-print":{"date-parts":[[2025,11]]},"abstract":"<jats:p>\n                    A man in his 60s with a history of asbestos exposure had been followed for progressive right-sided pleural thickening over several years. Imaging findings on high-resolution CT and\n                    <jats:sup>18<\/jats:sup>\n                    F-fluorodeoxyglucose positron emission tomography\/CT strongly suggested malignant pleural mesothelioma. However, both CT-guided pleural biopsy and endobronchial ultrasound-guided transbronchial needle aspiration of the mediastinal lymph nodes showed no evidence of malignancy, and a definitive diagnosis could not be established. After a 2-year interruption in follow-up, pleural thickening had further progressed. Immunostaining of previously obtained tissue samples ultimately led to a diagnosis of immunoglobulin G4 (IgG4)-related pleurisy. Steroid therapy resulted in a reduction of pleural thickening. This case highlights the importance of considering IgG4-related pleurisy in the differential diagnosis of pleural disease mimicking malignant pleural mesothelioma, particularly in patients with a history of asbestos exposure.\n                  <\/jats:p>","DOI":"10.1136\/bcr-2025-268562","type":"journal-article","created":{"date-parts":[[2025,11,24]],"date-time":"2025-11-24T02:05:14Z","timestamp":1763949914000},"page":"e268562","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":0,"title":["IgG4-related pleurisy with suspected asbestos involvement"],"prefix":"10.1136","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0009-0002-7442-0086","authenticated-orcid":false,"given":"Tomoyuki","family":"Ogata","sequence":"first","affiliation":[{"name":"Pulmonology, JA Toride Sogo Iryo Center, Toride, 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