title: IgG4-Related Lung Disease without Elevation of Serum IgG4 Level: A Case Report.
abstract: Since IgG4-related pancreatitis was first reported in 2001, IgG4-related disease has been identified in other organs such as salivary gland, gallbladder, thyroid, retroperitoneum and kidney; but lung invasion is rare. A 63-year-old man presented with hemoptysis at the pulmonary clinic and chest computed tomography revealed about 4.1 cm irregular shaped mass with spiculated margin at the left upper lobe. Despite no elevation of serum IgG4 level, he was finally diagnosed as IgG4-related lung disease by transthoracic needle biopsy. After treatment with oral glucocorticoids, hemoptysis disappeared and the size of lung mass was decreased.
authors.affiliation: Division of Pulmonary Medicine, Department of Internal Medicine, Eulji University Hospital, Daejeon, Korea.
authors.forename: Min Kyu
authors.initials: MK
authors.lastname: Kang
authors.affiliation: Division of Pulmonary Medicine, Department of Internal Medicine, Eulji University Hospital, Daejeon, Korea.
authors.forename: Yongseon
authors.initials: Y
authors.lastname: Cho
authors.affiliation: Division of Pulmonary Medicine, Department of Internal Medicine, Eulji University Hospital, Daejeon, Korea.
authors.forename: Minsoo
authors.initials: M
authors.lastname: Han
authors.affiliation: Division of Pulmonary Medicine, Department of Internal Medicine, Eulji University Hospital, Daejeon, Korea.
authors.forename: Sun Young
authors.initials: SY
authors.lastname: Jung
authors.affiliation: Division of Pulmonary Medicine, Department of Internal Medicine, Eulji University Hospital, Daejeon, Korea.
authors.forename: Kyoung Min
authors.initials: KM
authors.lastname: Moon
authors.affiliation: Division of Pulmonary Medicine, Department of Internal Medicine, Eulji University Hospital, Daejeon, Korea.
authors.forename: Jinyoung
authors.initials: J
authors.lastname: Kim
authors.affiliation: Division of Pulmonary Medicine, Department of Internal Medicine, Eulji University Hospital, Daejeon, Korea.
authors.forename: Ju Ri
authors.initials: JR
authors.lastname: Kim
authors.affiliation: Division of Pulmonary Medicine, Department of Internal Medicine, Eulji University Hospital, Daejeon, Korea.
authors.forename: Dong-Kyu
authors.initials: DK
authors.lastname: Lee
authors.affiliation: Division of Pulmonary Medicine, Department of Internal Medicine, Eulji University Hospital, Daejeon, Korea.
authors.forename: Jun Hyung
authors.initials: JH
authors.lastname: Park
authors.affiliation: Division of Pulmonary Medicine, Department of Internal Medicine, Eulji University Hospital, Daejeon, Korea.
authors.forename: So Hee
authors.initials: SH
authors.lastname: Chung
keywords: Hemoptysis; Immunoglobulins; Lung Diseases