Abstract
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.
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