RESUMEN
Objective To explore the clinical features of sentinel polyps (rectal polyps with proximal colon carcinoma) and its correlation with proximal colon carcinoma.Methods From January 2011 to June 2015,the clinical features of 331 hospitalized patients with rectal polyps were retrospectively analyzed.According to whether the patient with colon carcinoma,the clinical data of rectal polyps patients were divided into pure polyps group (n =294) and sentinel polyps group (n =37).The characteristics under endoscopy,clinical pathological features,treatment and prognosis of two groups were observed.Results The positive rate of tumor marker of sentinel polyps group was higher (67.6 ％,25/37) than that of pure polyps group (6.8 ％,20/294;x2 =32.174,P ＜ 0.01).When compared to pure polyps group,most polyps of sentinel polyps group were in maximum diameter over 1 cm [62.2％ (23/37) vs 46.9 ％ (138/294)],multi-polyps [n ＞5,43.2％ (16/37)vs11.6％ (34/294)] and adenomatous polyp [83.8 ％ (31/37) vs 35.7 ％ (105/294)] (x2 =10.863,15.686,and 22.653,P ＜0.01).Majority of the proximal colon carcinoma with rectal polyps was papillary adenoearcinoma and tubular adenocarcinoma which was account for 75.7 ％ (28/37);Duke A,29.7％ (11/37),Duke B,29.7％ (11/37),Duke C,24.3％ (9/37) and Duke D,16.2％ (6/37).96.6 ％ (282/294) of patients with pure polyps underwent endoscopic treatment and all of them were cured and discharged.40.5％ (15/37) of patients of sentinel polyps group accepted the radical operation and 24.3％ (9/37) received endoscopic submucosal dissection.Conclusions If multiple,maximum diameter over 1 cm and adenomatous rectal polyps were detected under colon endoscope,the possibility of carcinogenesis of the polyps or the proximal colon should be aware.The patient should be followed up in short-term and complete the whole colon examination.