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Accuracy of high-resolution MRI with lumen distention in rectal cancer staging and circumferential margin involvement prediction.

Abstract：

OBJECTIVE:To evaluate the accuracy of magnetic resonance imaging (MRI) with lumen distention for rectal cancer staging and circumferential resection margin (CRM) involvement prediction. MATERIALS AND METHODS:Seventy-three patients with primary rectal cancer underwent high-resolution MRI with a phased-array coil performed using 60-80 mL room air rectal distention, 1-3 weeks before surgery. MRI results were compared to postoperative histopathological findings. The overall MRI T staging accuracy was calculated. CRM involvement prediction and the N staging, the accuracy, sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) were assessed for each T stage. The agreement between MRI and histological results was assessed using weighted-kappa statistics. RESULTS:The overall MRI accuracy for T staging was 93.6% (k = 0.85). The accuracy, sensitivity, specificity, PPV and NPV for each T stage were as follows: 91.8%, 86.2%, 95.5%, 92.6% and 91.3% for the group ≤ T2; 90.4%, 94.6%, 86.1%, 87.5% and 94% for T3; 98,6%, 85.7%, 100%, 100% and 98.5% for T4, respectively. The predictive CRM accuracy was 94.5% (k = 0.86); the sensitivity, specificity, PPV and NPV were 89.5%, 96.3%, 89.5%, and 96.3% respectively. The N staging accuracy was 68.49% (k = 0.4). CONCLUSION:MRI performed with rectal lumen distention has proved to be an effective technique both for rectal cancer staging and involved CRM predicting.

journal_name

Korean J Radiol

journal_title

Korean journal of radiology

authors

Iannicelli E,Di Renzo S,Ferri M,Pilozzi E,Di Girolamo M,Sapori A,Ziparo V,David V

doi

10.3348/kjr.2014.15.1.37

subject

Has Abstract

pub_date

2014-01-01 00:00:00

pages

37-44

issue

1

eissn

1229-6929

issn

2005-8330

journal_volume

15

pub_type

杂志文章

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