Abstract
With the advance of surgical therapy of rectal carcinoma and improvement of adjuvant therapies the challenges for preoperative staging methods have grown over the last years. The radiologists understanding of rectal carcinoma is constantly evolving. The need of precise staging before operative therapy has lead to refinements in the technique of staging examinations. The election of patients in need of neoadjuvant therapy, reevaluation after therapy, radiation therapy planning and assessment of postoperative changes and recurrence are challenges in the diagnostic workup of patients with rectal cancer. Magnetic resonance imaging (MRI) is now routinely used for preoperative staging of rectal cancer. It provides accurate assessment of the tumor and the surrounding mesorectal fascia as well as precise depiction of important anatomic structures as for example the structures of the pelvic floor and the anal sphincter in tumors of the low rectum. On the other hand evaluation of nodal metastases is still a diagnostic challenge with MRI.
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Urban, M. (2012). Intersphincteric resection: MRI for staging. In: Schiessel, R., Metzger, P. (eds) Intersphincteric Resection for Low Rectal Tumors. Springer, Vienna. https://doi.org/10.1007/978-3-7091-0929-8_3
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DOI: https://doi.org/10.1007/978-3-7091-0929-8_3
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