Neoadjuvant radiotherapy for rectal cancer management

Gerard Feeney, Rishabh Sehgal, Margaret Sheehan, Aisling Hogan, Mark Regan, Myles Joyce, Michael Kerin, Gerard Feeney, Rishabh Sehgal, Margaret Sheehan, Aisling Hogan, Mark Regan, Myles Joyce, Michael Kerin

Abstract

Thirty per cent of all colorectal tumours develop in the rectum. The location of the rectum within the bony pelvis and its proximity to vital structures presents significant therapeutic challenges when considering neoadjuvant options and surgical interventions. Most patients with early rectal cancer can be adequately managed by surgery alone. However, a significant proportion of patients with rectal cancer present with locally advanced disease and will potentially benefit from down staging prior to surgery. Neoadjuvant therapy involves a variety of options including radiotherapy, chemotherapy used alone or in combination. Neoadjuvant radiotherapy in rectal cancer has been shown to be effective in reducing tumour burden in advance of curative surgery. The gold standard surgical rectal cancer management aims to achieve surgical removal of the tumour and all draining lymph nodes, within an intact mesorectal package, in order to minimise local recurrence. It is critically important that all rectal cancer cases are discussed at a multidisciplinary meeting represented by all relevant specialties. Pre-operative staging including CT thorax, abdomen, pelvis to assess for distal disease and magnetic resonance imaging to assess local involvement is essential. Staging radiology and MDT discussion are integral in identifying patients who require neoadjuvant radiotherapy. While Neoadjuvant radiotherapy is potentially beneficial it may also result in morbidity and thus should be reserved for those patients who are at a high risk of local failure, which includes patients with nodal involvement, extramural venous invasion and threatened circumferential margin. The aim of this review is to discuss the role of neoadjuvant radiotherapy in the management of rectal cancer.

Keywords: Low anterior resection syndrome; Neoadjuvant therapy; Rectal cancer; Robotic surgery; Stoma; Trans-anal total mesorectal excision; Transanal endoscopic microsurgery; Watch and wait.

Conflict of interest statement

Conflict-of-interest statement: There is no conflict of interest associated with any of the senior authors or other coauthors contributed their efforts in this manuscript.

Figures

Figure 1
Figure 1
Timeline of surgical innovations in the treatment of rectal cancer[81-87]. TME: Total mesorectal excision.

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