Management of malignant colorectal polyps in New Zealand

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Adenomatous polyps are common and usually treated satisfactorily by colonoscopic polypectomy (CP); however, a few are found to contain foci of invasive carcinoma,1 and the management of these malignant polyps (MP) is contentious. Consensus guidelines exist to assist clinicians in the management of MP, which have been defined as adenomas that appear benign macroscopically but in which there is invasion through the muscularis mucosae into the submucosa.2
There are major risks associated with the over‐treatment or under‐treatment of MP. Under‐treatment may result in missing the chance of curing an early malignancy and results in preventable mortality. Over‐treatment may result in significant morbidity and mortality related to major surgery, particularly for rectal lesions, where surgery is associated with higher rates of complications.3
The primary aim of this study was to describe the management of malignant colorectal polyps in a sample of the New Zealand population for the period 1999–2013. The secondary aim was to investigate clinicopathological factors associated with outcomes and ascertain which factors influence prognosis.
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