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  • Title: [Diagnosis on the preoperative staging of rectal cancer by magnetic resonance imaging with water-bag in rectum].
    Author: Wu CQ, Yang BL, Gu YF.
    Journal: Zhonghua Wei Chang Wai Ke Za Zhi; 2008 May; 11(3):246-8. PubMed ID: 18478469.
    Abstract:
    OBJECTIVE: To evaluate the accuracy of preoperative magnetic resonance imaging (MRI) with water-bag in rectum in prediction of pathological staging of rectal cancer. METHODS: Clinical data of 19 patients with rectal carcinoma assessed by MRI with water-bag in rectum for tumour (T) and mesorectal nodal (N) staging were analyzed retrospectively. Preoperative MRI assessment was compared with postoperative histopathological findings. RESULTS: The tumors were correctly staged by MRI in 15 patients, understaged in 2 and overstaged in 2. The accuracy of T stage was 78.9% (15/19). Mesorectal node were correctly staged in 11 patients, overstaged in 2 and understaged in 6. The accuracy of node staging was 57.9% (11/19), sensitivity was 3/9, and specificity was 80%(8/10). CONCLUSION: Preoperative MRI with water-bag in rectum can not provide correct predictive data on mesorectal node stage, but has certain value in the T staging of rectal carcinoma.
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