Magnetic resonance imaging cannot predict histological tumour involvement of a circumferential surgical margin in rectal cancer.

摘要: Aim  Several recent studies have attempted to evaluate the accuracy of preoperative magnetic resonance imaging (MRI) in predicting likelihood tumour involvement postoperative circumferential resection margin (CRM) rectal cancer with intention selecting patients who might benefit from neoadjuvant therapy and as a guide surgery. The aim this study was assess whether such can provide valid answer MRI accurately predict CRM by tumour. Method  design methodology on topic were critically examined. Results  Features identified affecting efficacy these were: representativeness patients, definition assessed histology, lack blinding surgeons pathologists results, effect treatment, number studied. Conclusion  Because methodological inadequacies completed date, there is insufficient evidence ability positive result an involved CRM. Although may be able identify that has extended mesorectal fascia and/or intersphincteric plane, logically, it cannot indicate where surgical boundary will ultimately lie, therefore validly should not relied upon for purpose.