单发肺转移瘤的瘤周X线影像表现

目的:探讨单发肺转移瘤(SPM)的瘤周X线影像表现及其诊断价值。方法:对比分析经病理证实的43例SPM和随机选择的70例单发周围型肺癌(PLC)和良性结节(SPN)的X线影像表现,采用双盲法观察所有病灶的近端和远端周围影像改变并用卡方检验进行统计学处理,同时分析其形成机制。结果:SPM远端及部分近端瘤周肺组织较距瘤体更远部分肺组织透亮度明显增高,并且远端周围肺纹理与近端相比明显稀疏,这两种征象与PLC和良性SPN的表现相比,具有显著性差异(P

X-ray peritumoral imaging feature study in solitary pulmonary metastasis

Objective To study the X-ray peritumoral imaging feature and its diagnostic value in solitary pulmonary metastasis(SPM). Methods The performances and the mechanism of X-ray image were analyzed in 43 pathologically proved patients with SPM, which was compared with those in 70 randomly selected patients with solitary peripheral lung cancers (PLC) or benign nodules (SPN). A double-blind method was used to observe the digital radiography (DR) and the CT images in the proximal and the distal region around the lung nodules. Chi-square test was used for statistical analysis. Results The imaging results showed obviously brighter in the distal and partial proximal peritumoral lung tissues in SPM than in the more distal lung tissues, and also showed sparser in the distal lung tissues than in the proximal region. The two above-mentioned features expressed more significantly in SPM than those in PLC and SPN (P<0.05). The different performances between SPM and other SPN were related to the differences of the V(ventilation)/Q(blood stream quantity) ratio in certain region and the pathological changes of the peritumoral lung interstitium. Conclusions The obvious brightness and the sparse lung texture in the distal peritumoral lung tissues are characteristic X-ray imaging features of SPM differing from other solitary pulmonary nodule.