The last ENETS guidelines on colorectal (hindgut) NETs were published in 2008, however, there has been new relevant data related to epidemiology and staging including the new WHO classification. These guidelines therefore include these new changes as well as update management and in addition we propose an algorithm of management.
Classification can be by primary site and the two natural categories are colon and rectum since these tumours have a different natural history. It is no longer appropriate to classify the colonic tumours as hindgut and midgut, since there is no evidence that caecal tumours are different from those arising from the remainder of the colon.
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