大肠癌螺旋CT动态增强扫描与肿瘤血管内皮生长因子和微血管密度的相关性

目的探讨大肠癌螺旋CT增强扫描病灶的强化程度、强化比值与肿瘤血管内皮生长因子(VEGF)、肿瘤微血管密度(MVD)间的相关性。方法对30例经纤维结肠镜或手术病理证实的大肠癌患者进行螺旋CT增强扫描,对手术病理标本应用辣根过氧化物酶链霉卵白素复合物(SP)免疫组织化学染色方法和二甲基联苯胺(DAB)显色法进行VEGF和肿瘤MVD的测定,将检测结果与病灶的强化程度和强化比值进行对照分析。结果在TNM分期的不同组间肿瘤VEGF和肿瘤MVD的表达存在明显差异,同时不同组间病灶的强化程度和强化比值也存在明显差异(P值均<005),两者间具有相关系,r1=05905,P1=00015,r2=04574,P2=00126。结论VEGF和肿瘤MVD是恶性肿瘤的生物学标志,增强扫描的强化程度和强化比值与其呈正相关,可间接反映其含量。

The relationship between enhancement degree on spiral computed tomography and the vascular endothelial growth factor and microvessel density expression in colorectal carcinoma

Objective To investigate the expression of vascular endothelial growth factor (VEGF) and microvessel density (MVD) in colorectal carcinoma, and to study its relationship with the enhancement degree of the lesion on SCT scan. Methods Thirty patients with colorectal carcinoma confirmed by colonofiberscope or operation were examined by SCT, and the CT attenuations were measured. The resected tumor specimens were immunohistochemically stained with CD34 for measuring MVD and stained with VEGF. The results were compared with the enhancement degree of the lesions observed on SCT scan. Results The enhancement correlated well positively with MVD and VEGF of the colorectal carcinoma. The degree of enhancement correlated closely with the blood supply and MVD and VEGF of colorectal carcinoma (r_1=0.5905, P_1=0.0015; r_2=0.4574, P_2=0.0126). Conclusion High expression of VEGF and MVD is a biological label of malignancy(P<0.05). Spiral dynamic CT scan can demonstrate the enhancement characteristics of colorectal carcinoma.