Objective： To investigate the enhancement basis and the mechanisms of solitary pulmonary nodules （SPNs） by comparing the differences in microvascular structure between benign and malignant lesions. Methods： Dynami...Objective： To investigate the enhancement basis and the mechanisms of solitary pulmonary nodules （SPNs） by comparing the differences in microvascular structure between benign and malignant lesions. Methods： Dynamic contrast-enhanced CT scan was performed on 53 patients with SPNs （diameter〈3 cm, 38 peripheral lung cancers, 5 hamartomas, 10 inflammatory lesions） using a Siemens Plus S or a Marconi MX8000 multi slices spiral CT scanner. The time-attenuation curves were interpreted. The microvascular density （MVD） and the continuity of the microvessels＇ basemental membrane in the dissected specimens were observed with the ABC （avldin-biotin complex） immuno-histochemical method in all patients. Results ：The CT enhancement values of lung cancer （49.05± 16.08 HU） and inflammatory lesions （49.59±21.30 HU） were significantly higher than those of hamartoma （8.98±4.56 HU） t=7.48, P〈0.051 t=8.35, P〈0.05）. But the enhancement of lung cancer was similar to that of inflammatory lesions （t=0.76, P±0. 05）. The time attenuation curve of inflammatory lesions tended to increase faster and reached a higher peak compared to the lung cancer, and both of them maintained a high plateau after crossing. The hamartoma showed a slight increase in the time-attenuation curve and demonstrated a lowplateau curve. The MVD of SPNs was positively correlated with CT enhancement （r=0. 8051）. The microvascular counts of peripheral lung cancer （48.45±10. 09） and inflammatory lesions （49. 60±19. 94） were significantly higher than those of hamartoma （8.70±7. 30） （t=11. 64, P〈0.001, t=6. 09, P〈0. 001 ）, but no significant difference was found between lung cancer and inflammatory lesions （t= -0.26, P=0.799）. There was no difference in the continuity of basement membrane between nodules with anen haneement less than 30 HU and those with an enhancement higher than 30HU （X^2=3. 13, P〉0.05 ）. Conclusion： The microvascular counts mainly contribute to the enhancement value of SPNs. The basement membrane is not related to nodule enhancement, but it might influence the pattern of the time-attenuation curve.展开更多
文摘Objective： To investigate the enhancement basis and the mechanisms of solitary pulmonary nodules （SPNs） by comparing the differences in microvascular structure between benign and malignant lesions. Methods： Dynamic contrast-enhanced CT scan was performed on 53 patients with SPNs （diameter〈3 cm, 38 peripheral lung cancers, 5 hamartomas, 10 inflammatory lesions） using a Siemens Plus S or a Marconi MX8000 multi slices spiral CT scanner. The time-attenuation curves were interpreted. The microvascular density （MVD） and the continuity of the microvessels＇ basemental membrane in the dissected specimens were observed with the ABC （avldin-biotin complex） immuno-histochemical method in all patients. Results ：The CT enhancement values of lung cancer （49.05± 16.08 HU） and inflammatory lesions （49.59±21.30 HU） were significantly higher than those of hamartoma （8.98±4.56 HU） t=7.48, P〈0.051 t=8.35, P〈0.05）. But the enhancement of lung cancer was similar to that of inflammatory lesions （t=0.76, P±0. 05）. The time attenuation curve of inflammatory lesions tended to increase faster and reached a higher peak compared to the lung cancer, and both of them maintained a high plateau after crossing. The hamartoma showed a slight increase in the time-attenuation curve and demonstrated a lowplateau curve. The MVD of SPNs was positively correlated with CT enhancement （r=0. 8051）. The microvascular counts of peripheral lung cancer （48.45±10. 09） and inflammatory lesions （49. 60±19. 94） were significantly higher than those of hamartoma （8.70±7. 30） （t=11. 64, P〈0.001, t=6. 09, P〈0. 001 ）, but no significant difference was found between lung cancer and inflammatory lesions （t= -0.26, P=0.799）. There was no difference in the continuity of basement membrane between nodules with anen haneement less than 30 HU and those with an enhancement higher than 30HU （X^2=3. 13, P〉0.05 ）. Conclusion： The microvascular counts mainly contribute to the enhancement value of SPNs. The basement membrane is not related to nodule enhancement, but it might influence the pattern of the time-attenuation curve.
文摘目的 探讨CT引导下微弹簧圈定位与医用胶结合亚甲蓝(MGMB)定位在孤立性肺结节(SPN)电视胸腔镜手术(VATS)前定位中的临床价值,并分析定位后发生并发症的危险因素。方法 选取我院收治的292例SPN患者,分为微弹簧圈组129例,MGMB组163例,比较两种定位技术的安全性和成功率,以及潜在临床价值。结果 所有患者均于VATS术前36 h内完成定位,相比于微弹簧圈组,MGMB组的定位时间更短(7.42±2.58 vs 14.80±3.60)min,差异有统计学意义(P<0.001),住院时间更短(5.67±2.16 vs 10.26±3.69)天,差异有统计学意义(P<0.001)。两组术前定位成功率分别为96.9%(125/129)和100%(163/163)。定位过程中无死亡或严重并发症发生,两组并发症发生率差异无统计学意义(P=0.902)。Logistic回归分析显示,定位时间是总并发症发生的危险因素(OR=1.119,95%可信区间,1.002~1.249,P=0.045)。结论 两种技术都可以在VATS之前安全有效地定位SPN,但MGMB组的定位时间及住院时间更短,实用性及潜在的临床价值更高,值得临床推广。
文摘目的探讨亚厘米(<10 mm)孤立性肺结节(solitary pulmonary nodule,SPN)的临床诊断和外科治疗方法。方法对我院2006年1月~2015年12月手术治疗62例亚厘米SPN进行回顾性分析。术前均行多次胸部CT扫描随访,随访观察时间3~72个月(平均6.8月)。术前胸部CT肺窗测定病变大小,直径≤5 mm 28例,6~9 mm 34例。实性结节17例,半实性结节36例,纯磨玻璃样病变9例。其中56例行术前病变定位。术式包括胸腔镜单纯病变切除或剔除术2例,肺楔形切除术47例,肺段切除术8例,肺叶切除术5例。结果术后病理证实恶性结节54例(87.1%),包括非典型性腺瘤样增生(atypical adenomatous hyperplasia,AAH)和原发恶性肿瘤共49例,转移瘤5例;良性结节8例(12.9%)。结论亚厘米SPN影像学静态特征相对缺乏,需要通过其实质变化及动态观察确定诊疗策略。影像学定位技术有助于胸腔镜术中准确定位,肺叶和亚肺叶切除对亚厘米SPN的诊疗安全有效。
