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- W2079502405 abstract "Preoperative staging of rectal cancer can influence the choice of surgery and the use of neoadjuvant therapy. This review evaluates the use of endorectal ultrasound (ERUS) and magnetic resonance imaging (MRI) in the local staging of rectal cancer. Staging for distant metastases is beyond the scope of this review. A MEDLINE search for published work in English between 1984–2004 was carried out by entering the key words of ERUS, MRI and preoperative imaging and rectal cancer. Initially, 867 articles were retrieved. Abstracts were reviewed and papers selected according to the inclusion criteria of a minimum of 50 patients and papers published in English. Papers focusing on preoperative chemoradiotherapy and distal metastases were excluded. Thirty‐one papers were included in the systematic review. The examination techniques and images obtained are discussed and the respective accuracy is reviewed. ERUS and MRI have complementary roles in the assessment of tumour depth. Ultrasound has an overall accuracy of 82% (T1, 2, 40–100%; T3, 4, 25–100%) and is particularly useful for early localized rectal cancers. MRI has an accuracy of 76% (T1, 2, 29–80%; T3, 4, 0–100%) and is useful in more advanced disease by providing clearer definition of the mesorectum and mesorectal fascia. Both methods have similar accuracy in the assessment of nodal metastases. Ultrasound is more operator dependent and accuracies improve with experience, but it is more portable and accessible than MRI. Improvements in technology and increased operator experience have led to more accurate preoperative staging. ERUS and MRI are complementary and are most accurate for early localized cancers and more advanced cancers, respectively." @default.
- W2079502405 created "2016-06-24" @default.
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- W2079502405 date "2006-06-01" @default.
- W2079502405 modified "2023-10-17" @default.
- W2079502405 title "PREOPERATIVE LOCO-REGIONAL IMAGING IN RECTAL CANCER" @default.
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- W2079502405 doi "https://doi.org/10.1111/j.1445-2197.2006.03744.x" @default.
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