Discussion
Diagnosis With Brief Discussion
- Diagnosis
- IgG4 related lung disease
- Radiologic Findings
- Chest CT shows two well-enhancing nodular lesions in RLL superior and posterobasal segment. Pleura-based nodule is also seen in RUL. There is mesenteric fat infiltration on abdomen CT.
The patient underwent VATS resection and laparoscopic mesenteric resection for diagnosis.
The pathologic report revealed numerous IgG4-positive plasma cells and it was confirmed as IgG4 related lung disease.
- Brief Review
- Recently, increasing attention has been drawn to IgG4 related disease. IgG4 related lung disease is a spectrum of systemic IgG4 related disease characterized by extensive IgG4-positive plasma cells and T-lymphocyte infiltration of various organs.
The radiologic features of IgG4 related lung disease could be classified into four types : solid nodular, round-shaped GGO, alveolar interstitial, and bronchovascular. Differential diagnosis varies among radiologic features: lung cancer (solid nodular type), adenocarcinoma (round-shaped GGO), interstitial pneumonia (alveolar interstitial), sarcoidosis or lymphoplroliferative disease (bronchovascular).
Complete surgical resection is recommended for both diagnosis and treatment. However, some reports that IgG4 related lung disease response to corticosteroid therapy.
- References
- 1. Dai Inoue, Yoh Zen, Hitoshi Abo, Toshifumi Gabata, Hiroshi Demachi, Takeshi Kobayashi, Jyuun Yoshikawa, Shiro Miyayama, Masahide Yasui, Yasuni Nakanuma, Osamu Matsui : Immunoglobulin G4-related Lung Disease : CT findings with Pathologic Correlations. Radiology 2009; 251:260-270.
2. Paraskevi A. Vlachou, Korosh Khalili, Hyun-jung Jang, Sandra Fischer, Gideon M. Hirschfield, Tae Kyound Kim : IgG4-related Sclerosing Disease : Autoimmune Pancreatitis and Extrapancreatic Manifestations. Radiographics 2011; 31:1379-1402.
- Keywords
- lung, metabolic ans storage, systemic disease,