IgG4-Related Pleuritis With No Other Organ Involvement.

Published on Nov 1, 2018in The American Journal of the Medical Sciences1.911
· DOI :10.1016/J.AMJMS.2018.05.004
Toshiyuki Kita15
Estimated H-index: 15
Tomoyuki Araya7
Estimated H-index: 7
+ 4 AuthorsKazuo Kasahara26
Estimated H-index: 26
(Kanazawa University)
Abstract A 65-year-old man was admitted for productive cough and dyspnea. Bilateral pleural effusions were observed on chest X-ray. Although the bilateral pleural effusions were exudative with an increased number of lymphocytes, bacterial culture and polymerase chain reaction analysis for Mycobacterium tuberculosis were negative. Immunological examinations showed high levels of immunoglobulin G4 (IgG4) in both serum and pleural effusion fluid. Pathologic evaluation of a left pleural biopsy specimen using hematoxylin and eosin staining and immunohistochemical staining showed fibrosis-associated lymphoplasmacytic infiltration, 50 IgG4-positive plasma cells per high-power field, and an IgG4/IgG ratio of 40%. Thus, a diagnosis of IgG4-related pleuritis without other systemic manifestations was established. The bilateral pleural effusion improved following corticosteroid therapy. This is a rare case of IgG4-related pleuritis with no other organ involvement.
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