Ghigi G, Garcea D, Canini R, Battista G, Boriani F, Salizzoni E, Carli Moretti C, Talarico F, Accorsi D, Corinaldesi A
Istituto di Radiologia, Università di Bologna.
Radiol Med. 1995 Jul-Aug;90(1-2):56-61.
The value of transrectal US is known in the preoperative staging of rectal cancer but remains debated in the follow-up of the patients submitted to anterior resection or local therapy. The authors report their experience with the postoperative follow-up of 80 patients submitted to 125 transrectal US exams to study method reliability. The results were 9 true positive, 2 false positive, 113 true negative and 1 false negative cases, with 90% sensitivity, 98.3% specificity and 97.6% accuracy rates. Positive predictive value was 81.8% and negative predictive values was 99.1%. Twelve patients were submitted also to MRI which correctly diagnosed one false negative result of transrectal US. Twenty-one patients were examined also with transrectal Doppler and color-Doppler US: in rectal cancer recurrences the peak velocity of hemorrhoid vascular flow was higher than in non-recurrent patients. On the basis of our results, transrectal US deserves to be included in the postoperative follow-up of the patients submitted to anterior resection or to local therapy for rectal cancer. Moreover, according to our preliminary findings, Doppler and color-Doppler US can improve transrectal US reliability in detecting local recurrences.
经直肠超声在直肠癌术前分期中的价值已为人所知，但在接受前切除术或局部治疗的患者随访中仍存在争议。作者报告了他们对80例患者进行125次经直肠超声检查术后随访的经验，以研究该方法的可靠性。结果为9例假阳性、2例假阴性、113例真阴性和1例真阳性病例，灵敏度为90%，特异度为98.3%，准确率为97.6%。阳性预测值为81.8%，阴性预测值为99.1%。12例患者还接受了MRI检查，MRI正确诊断出1例假阴性经直肠超声检查结果。21例患者还接受了经直肠多普勒和彩色多普勒超声检查：在直肠癌复发患者中，痔血管血流的峰值速度高于未复发患者。根据我们的结果，经直肠超声值得纳入接受直肠癌前切除术或局部治疗患者的术后随访中。此外，根据我们的初步研究结果，多普勒和彩色多普勒超声可以提高经直肠超声检测局部复发的可靠性。
