肺生検によりリウマチ結節と診断できた1例

Rheumatoid Lung Nodule could be Diagnosed by Pulmonary Biopsy：Report of a Case

はじめに　関節リウマチに合併する肺病変として胸膜炎や間質性肺炎，肺リウマチ結節などが知られているが1），肺リウマチ結節は関節リウマチ患者の0.18～0.3％に認められるとの報告2）があり比較的まれである．われわれは，PET-CTでfluorodeoxyglucose（FDG）の異常集積を認め肺癌との鑑別に難渋した症例を経験したので報告する．

A 60-year-old woman was referred to our department for further examination for chest abnormal shadow in the right upper lobe. She had a past history of rheumatoid arthritis. Positron emission tomography-computed tomography （PET-CT） showed mild abnormal accumulation of fluorodeoxyglucose （FDG）. Because of lung cancer could not be denied, she underwent partial resection of the right upper lobe and the nodule was diagnosed as a rheumatoid nodule by pathology.