Understanding the role of primary tumour localisation in colorectal cancer treatment and outcomes
AuthorStintzing, S; Tejpar, S; Gibbs, P; Thiebach, L; Lenz, H-J
Source TitleEuropean Journal of Cancer
PublisherELSEVIER SCI LTD
University of Melbourne Author/sGibbs, Peter
Document TypeJournal Article
CitationsStintzing, S., Tejpar, S., Gibbs, P., Thiebach, L. & Lenz, H. -J. (2017). Understanding the role of primary tumour localisation in colorectal cancer treatment and outcomes. EUROPEAN JOURNAL OF CANCER, 84, pp.69-80. https://doi.org/10.1016/j.ejca.2017.07.016.
Access StatusOpen Access
Metastatic colorectal carcinoma (mCRC) is a heterogeneous disease with differing outcomes and clinical responses and poor prognosis. CRCs can be characterised by their primary tumour location within the colon. The left-sided colon, derived from the hindgut, includes the distal third of the transverse colon, splenic flexure, descending colon, sigmoid colon and rectum. The right-sided colon, derived from the midgut, includes the proximal two-thirds of the transverse colon, ascending colon and caecum. Sometimes, the rectum is described separately, despite originating from the hindgut, and in many clinical series, the left-sided colon includes only tumours within and distal to the splenic flexure. Differences in the microbiome, clinical characteristics and chromosomal and molecular characteristics have been reported between the right and left side of the colon, regardless of how this is defined. There is now strong evidence from clinical studies in patients with mCRC for the prognostic effect of primary tumour location. The impact of primary colonic tumour location on response to treatment is now under investigation in a large number of clinical studies in patients with mCRC. In this review, we summarise the microbiome, clinical, chromosomal and molecular differences associated with the primary location of CRC. We present an overview of the proven prognostic impact of primary tumour location for patients with mCRC and discuss emerging data for the predictive impact of primary tumour location on clinical outcome.
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