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Sequential CT Findings in Two Cases of Immunoglobulin G4-Related Lung Disease: Focused on Disease Progression

Immunoglobulin G4 관련 폐 질환의 질병 경과에 따른 순차적 CT 소견: 증례 보고

  • Lee, Dong-Kyu (Department of Radiology, Korea University Anam Hospital, Korea University College of Medicine) ;
  • Ham, Soo-Youn (Department of Radiology, Kangbuk Samsung Hospital)
  • 이동규 (고려대학교 의과대학 안암병원 영상의학과) ;
  • 함수연 (강북삼성병원 영상의학과)
  • Received : 2018.03.29
  • Accepted : 2018.05.08
  • Published : 2018.11.01

Abstract

Immunoglobulin G4 (IgG4)-related lung disease has been actively studied over the past few years. Radiologic findings of IgG4-related lung disease vary among patients, but there are no long-term follow up studies regarding variations in imaging features over the course of disease progression. In two cases with relatively long-term follow up, diverse early and late computed tomography (CT) findings of IgG4-related lung disease are reviewed in this report. In contrast to nodular or diffuse ground-glass opacity, which was predominantly noted in CT scans at earlier stages of disease, honeycombing and traction bronchiectasis were regarded as late radiologic manifestations. Solid nodules might be visible in both early and late stages; however, development of new solid nodules and enlargement of preexisting nodules could occur during disease progression. Interlobular septal thickening and mediastinal/hilar lymphadenopathy were persistent, even in later stages of the disease. These findings might be useful in making an accurate and timely diagnosis of IgG4-related lung disease.

면역글로불린 G4 (Immunoglobulin G4; 이하 IgG4) 관련 폐 질환은 지난 몇 년간 활발하게 기술되어 온 질환이다. IgG4 관련 폐 질환의 영상의학적 소견은 환자마다 다양하게 알려져 있으나, 질병의 진행에 따른 다양한 영상 소견들을 장기 추적한 연구는 보고되지 않았다. 본 증례 보고에서는 비교적 장기간의 추적을 시행한 2예를 통해, IgG4 관련 폐 질환의 다양한 초기 및 후기 컴퓨터단층촬영 소견들을 고찰하였다. 비교적 초기 CT에서 보였던 결절성 혹은 미만성 간유리음영과 달리, 벌집모양음영이나 견인성 기관지확장증은 후기 소견들로 생각되었다. 고형 결절들은 초기 및 후기에서 모두 보였으나, 새로운 결절의 발생 혹은 기존 결절들의 크기 증가가 질병이 진행함에 따라 나타났다. 소엽간 중격 비후와 종격동 및 폐문 림프절 비대는 질병의 후기에서도 지속적으로 관찰되었다. 이는 IgG4 관련 폐 질환의 정확하고 시기적절한 진단에 도움이 될 것으로 기대된다.

Keywords

References

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