Computer Tomography Features of Antineutrophil Cytoplasm Antibody-associated Vasculitis-interstitial Lung Disease and Its Correlation with Antineutrophil Cytoplasmic Antibody Concentration
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摘要:
本研究旨在系统分析抗中性粒细胞胞浆抗体相关性血管炎(AAV)−间质性肺病(ILD)患者首次诊断时的CT影像学特征,探讨病变类型、分布特点及其与实验室检查结果的相关性。回顾性纳入92例首次确诊为AAV-ILD的患者,收集患者的临床及CT影像数据,对CT影像资料进行主观定量分析,评估病变类型(如磨玻璃影、网格影、蜂窝样改变、实变影及牵拉性支气管扩张)及其分布特征。采用肺纤维化评分系统量化病变严重程度,分析影像学特征ANCA浓度之间的相关性。结果发现AAV-ILD在老年男性中更为常见,蜂窝样改变和网格影是最常见的影像学表现,病变主要分布于双肺下叶及外周区域,主要表现为寻常型间质性肺炎(UIP)模式。另外还发现肺纤维化评分与髓过氧化物酶(MPO)浓度呈显著正相关,蜂窝样改变评分与MPO浓度也存在正相关。AAV-ILD的CT表现具有独特的特点,而且MPO-ANCA与肺纤维化的相关性提示MPO可能成为肺纤维化进展的潜在生物标志物,这为深入理解AAV-ILD的影像学特征及其病理机制提供了重要依据。
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关键词:
- 抗中性粒细胞胞浆抗体 /
- 间质性肺病 /
- 高分辨率CT /
- 磨玻璃影 /
- 蜂窝样改变
Abstract:This study systematically analyzed the CT imaging features of patients diagnosed with ANCA-associated vasculitis (AAV)-related interstitial lung disease (ILD) at the time of their first diagnosis. The types and distribution characteristics of the lesions and their correlation with laboratory findings were investigated. A retrospective study was conducted on 92 patients with newly diagnosed AAV-ILD. Clinical and CT imaging data were collected. CT imaging data were analyzed qualitatively and quantitatively to evaluate lesion types (e.g., ground-glass opacities, reticulations, honeycombing, consolidation, and traction bronchiectasis) and their distribution patterns. The severity of the lesions was quantified using a pulmonary fibrosis scoring system, and the correlation between imaging features and laboratory indices was analyzed. AAV-ILD was more commonly observed in elderly male patients. Honeycombing and reticulations were the most common CT-imaging findings, with lesions primarily distributed in the bilateral lower lungs and peripheral regions. AAV-ILD predominantly exhibited a usual interstitial pneumonia (UIP) pattern. A significant positive correlation was also observed between the pulmonary fibrosis score and myeloperoxidase (MPO) concentration and between honeycombing scores and MPO concentration. The CT features of AAV-ILD are unique. The correlation between MPO and pulmonary fibrosis suggests that MPO may serve as a potential biomarker for the progression of pulmonary fibrosis. These findings provide important insights into the imaging characteristics and pathological mechanisms of AAV-ILD.
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表 1 AAV-ILD患者临床特征
Table 1 Clinical characteristics of patients with AAV-ILD
项目 临床特征 例数 占比/% 总例数 92 100 性别 男 54 58.7 女 38 41.3 吸烟史 有长期吸烟者≥10年12例 30 32.6 无 62 67.4 症状 咳嗽(干咳) 50 54.4 气促(劳力性呼吸困难) 40 43.5 胸痛 8 8.7 咯血 5 5.4 表 2 AAV-ILD患者肺部HRCT特征
Table 2 HRCT characteristics of lungs in patients with AAV-ILD
项目 HRCT特征 例数 占比/% 总例数 92 100 影像学表现 蜂窝样改变(下叶分布为主) 78 84.8 磨玻璃密度影 72 78.3 实变影 6 6.5 网格影 85 92.4 牵拉性支气管扩张 72 78.3 分布特点 外周分布 70 76.1 弥漫性分布 22 23.9 分布模式 UIP 62 67.4 NSIP 15 16.3 OP 10 10.9 DAD 4 4.4 NSIP叠加DAD 1 1.1 -
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