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Rectal carcinoid is a rare rectal tumour with a good prognosis. The aim of this study was to assess its clinicopathological characteristics and prognostic factors in a single institution.Clinical and pathological information was retrospectively collected in a single institution, and patients' outcomes were determined. Multivariate analyses were performed to find independent prognostic factors attributed to overall survival.A total of 106 patients with rectal carcinoid were included. In all, 66% of the patients underwent transanal local excision and 34% had transabdominal surgery. The 5-year survival rate was 87%. Muscularis invasion was the only independent prognostic factor for predicting 5-year survival (P = 0.00046). Tumour size was found to be significantly associated with muscular invasion (P = 0.00003). The area under the curve of tumour size in the receiver operating characteristic curve for predicting muscular invasion was 0.92.Patients with rectal carcinoid have a good prognosis. Muscular invasion is an independent risk factor of survival.