Local staging of rectal cancer with transrectal ultrasound and endorectal magnetic resonance imaging - Comparison with histologic findings
Local staging of rectal cancer with transrectal ultrasound and endorectal magnetic resonance imaging - Comparison with histologic findings
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DOI：
10.1007/bf02258299
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发表时间：
2000-03-01
影响因子：
3.9
通讯作者：
Pappalardo, G
中科院分区：
文献类型：
--
作者：
Gualdi, GF;Casciani, E;Pappalardo, G
目的：比较直肠内线圈磁共振成像与经直肠超声对直肠癌分期的准确性。方法：对26例经内窥镜活检病理证实的直肠癌患者进行直肠内线圈磁共振成像和经直肠超声分期，然后行根治性手术。结果：直肠线圈磁共振成像在评估T方面优于经直肠超声(准确率，84.6%比76.9%)：前者高估4例，未发现不足；后者高估5例，不足1例。两种方法在评估N方面的结果相似：直肠内线圈磁共振成像的灵敏度和特异度分别为81%和66%，经直肠超声的灵敏度和特异度分别为72%和80%。结论：准确的直肠癌局部区域分期是制定直肠癌最佳治疗方案的关键。直肠内线圈磁共振成像和经直肠超声显示相似的结果；前者更昂贵，而后者依赖于操作员。目前，直肠内线圈磁共振成像的使用似乎只有在经直肠超声结果可疑的特定低位直肠癌中才是合理的。然而，有必要进行更广泛的研究来比较这些诊断技术的优势。
PURPOSE: The aim of the present study was to compare the accuracy of endorectal coil magnetic resonance imaging with transrectal ultrasound in staging rectal carcinoma. METHODS: Twenty-six consecutive patients with rectal carcinoma, histologically proven by endoscopic biopsy, were staged with both endorectal coil magnetic resonance imaging and transrectal ultrasound and then underwent radical surgery. The preoperative staging was compared with histologic findings of the operative specimen according to TNM classification RESULTS: Endorectal coil magnetic resonance imaging showed better results but was not statistically significantly different from transrectal ultrasound in evaluating T (accuracy, 84.6 vs. 76.9 percent): four overstaged and no understaged cases for the former and five overstaged cases and one understaged case for the latter. Both procedures showed similar results in evaluating N: 81 percent sensitivity and 66 percent specificity for endorectal coil magnetic resonance imaging and 72 percent sensitivity and 80 percent specificity for transrectal ultrasound. CONCLUSIONS: An accurate locoregional staging of rectal cancer is essential for the planning of optimal therapy for rectal cancer. Endorectal coil magnetic resonance imaging and transrectal ultrasound showed similar results; the former is more expensive, whereas the latter is operator dependent. At present the use of endorectal coil magnetic resonance imaging seems to be justified only in selected low rectal cancers where transrectal ultrasound yielded doubtful results. However, a more extensive study is necessary to compare the advantages of these diagnostic techniques.