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目的 研究窄波成像(NBI)电子膀胱软镜在膀胱肿瘤诊断中的应用价值.方法 临床疑似膀胱肿瘤患者31例,采用Olympus ExeraⅡ电子膀胱软镜系统,分别在NBI和普通白光(WLI)视野下检查,顺序采用随机化法,观察时间相同.分别取2种视野下膀胱内所见可疑病灶活检,比较2种检查方法膀胱肿瘤诊断准确率.结果 31例患者中,经病理检查确诊为膀胱尿路上皮癌28例(90%),其中Tis 3例、Ta 15例、T1 7例、T2 3例;低级别癌20例、高级别癌8例;多发病灶16例、单发病灶12例.WLI下共取活检73处,癌组织61处,阳性率84%,确诊膀胱癌23例;NBI下共取活检91处,癌组织80处,阳性率88%,确诊膀胱癌28例.NBI发现癌组织较WLI多19处,2组检出准确率比较,差异有统计学意义(P＜0.05). 结论 NBI诊断膀胱肿瘤的准确率明显高于WLI电子膀胱软镜.

Objective To study the sensitivity and specifity for detection of bladder tumor by Narrow-band imaging flexible cystoscopy compared with WLI flexible systoscopy. Methods Between February 2009 and July 2009, NBI flexible cystoscopy and conventional WLI flexible cystoscopy with the same instrument (Olympus Exera Ⅱ endoscopy system) were both performed on 31 patients highly suspect of bladder neoplasm with same observed time and in a randomized sequenced paradigm. Every suspect mucosa lesion was biopsied in both NBI and WLI image to compare the diagnostic accuracy between them. Results Twenty-eight patients(90%) were pathologically bladder urothelial cell carcinoma (UCC). Of 28 patients 3 were Tis, 15 were Ta, 7 were T1, and 3 were T2. Twenty were low grade carcinom, 8 were high grade carcinoma and 16 had multiple tumors, 12 had a single tumor.Of 73 biopsied lesions, 61 were diagnosed UCC under WLI image with 84% sensitivity, while 80 of 91 diagnosed under NBI image with 88% sensitivity. WLI detected 23 patients with bladder UCC while NBI detected all 28 patients. NBI detected 19 additional UCC lesions in 15 of 28 patients, as compared with WLI(P＜0. 05). Conclusion NBI flexible cystoscopy can detect more bladder urothelial cell carcinoma than WLI flexible cystoscopy.