摘要
目的探讨少见病例成人肺先天性囊性腺瘤样畸形(CCAM)的影像学表现,提高影像诊断水平。方法对2例经手术病理证实的成人CCAM的影像学资料进行随访和回顾性分析:病例1行胸部CT平扫及增强、18FPET-CT检查;病例2行胸部CT平扫及18F-PET/CT检查。结果病例1胸部CT表现为右肺上叶后段"磨玻璃"样密度结节灶,内见"空泡征"及点状钙化灶,增强扫描实质部分轻度强化,18F-PET/CT示右肺上叶后段结节灶轻度放射性摄取(SUVmax=1.0);病例2胸部CT表现为右肺下叶后基底段实性结节灶,边缘见"毛刺征",18F-PET/CT常规与延迟相未见明显放射性摄取。结论 CCAM的影像学表现为孤立性或"磨玻璃"样密度结节与周围型肺癌、肺泡癌等恶性肺结节有类似的影像表现,鉴别存在困难;18F-PET/CT代谢活性未见明显升高,有助于其鉴别,并能预防其伴发肺癌的危险。
Objective To investigate the imaging manifestations of rare congenital cystic adenomatoid malformation （CCAM） of lung in adults and to improve the diagnostic accuracy of CCAM. Methods The clinical imaging materials of two adult patients with pathologically-proved CCAM of lung were retrospectively analyzed. Chest plain and enhanced CT scanning as well as ^18F-PET/CT examination was performed in one case, while only plain thoracic CT scanning as well as ^18F-PET/CT examination was performed in another ease. Results In one case, chest CT scanning revealed that a ＂ground glass＂ like density nodule was seen at the posterior segment of the right upper lobe with ＂vacuole sign＂ and punctuate calcifications, which showed slight enhancement on the enhanced CT images. ^18F-PET/CT examination showed that lower uptake of isotope was detected in this nodule （ SUVmax = 1.0）. In another case, chest CT scanning demonstrated a small solid nodule with speculation sign at its border, which was located at the posterior basal segment of the right lower lobe, and ^18F-PET/CT examination showed no obvious uptake of isotope in routine and delayed phase. Conclusion CCAM can be manifested as a solitary or ＂ground glass＂ density nodule, which is very difficult to differentiate with malig- nant pulmonary nodules such as peripheral lung cancer, alveolar cell carcinoma, etc. ^18F-PET/CT examination is helpful in making diagnosis as its metabolic activity is not obviously increased.
出处
《临床放射学杂志》
CSCD
北大核心
2014年第4期624-627,共4页
Journal of Clinical Radiology
关键词
X线摄影技术
囊腺瘤畸形
肺
X-ray computed Cystic adenomatoid malformation Lung
