Immunoglobulin G4-related disease in the thorax: Imaging findings and differential diagnosis

Yookyung Kim, Hye Young Choi

Research output: Contribution to journalReview articlepeer-review

2 Scopus citations


Immunoglobulin G4-related disease (IgG4-RD) is a chronic inflammatory condition involving multiple organs, including the salivary or lacrimal glands, orbit, pancreas, bile duct, liver, kidney, retroperitoneum, aorta, lung, and lymph nodes. It is histologically characterized by tissue infiltration with lymphocytes and IgG4-secreting plasma cells, storiform fibrosis, and obliterative phlebitis. In the thoracic involvement of IgG4-RD, mediastinal lymphadenopathy and perilymphangitic interstitial thickening of the lung are the most common findings. Peribronchovascular and septal thickening and paravertebral band-like soft tissue are characteristic findings of IgG4-RD. Other findings include pulmonary nodules or masses, ground-glass opacity, alveolar interstitial thickening, pleural effusion or thickening, mass in the chest wall or mediastinum, and arteritis involving the aorta and coronary artery. Radiologic differential diagnosis of various malignancies, infections, and inflammatory conditions is needed. In this review, we describe the imaging findings of IgG4-RD and the radiologic differential diagnoses in the thorax.

Original languageEnglish
JournalJournal of the Korean Society of Radiology
Issue number4
StatePublished - Jul 2021

Bibliographical note

Publisher Copyright:
Copyrights © 2021 The Korean Society of Radiology


  • Computed Tomography, X-Ray
  • IgG4-Related Disease
  • Lung
  • Pleura


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