Meng Wang1, Changqing Hao2, Shuanghua Xie1, Shanrui Ma1, Qing Ma1, Rongshou Zheng1, Ru Chen1, Xinqing Li1, Wenqiang Wei1. 1. Office of Cancer Registry, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China. 2. Department of Endoscopy, Linzhou Cancer Hospital, Anyang 456550, China.
Abstract
OBJECTIVE: To explore the natural history of severe dysplasia/carcinoma in situ (SD/CIS) patients and to evaluate the efficacy of endoscopic treatment to SD/CIS patients. METHODS: Between January 2005 and December 2009, a population-based prospective screening program on esophageal squamous cell carcinoma (ESCC) was performed in Linzhou, China, with endoscopic screening plus iodine staining. All the eligible histologically confirmed SD/CIS patients were followed up through the door-to-door follow-up and local cancer registry. The endpoint was diagnosed as ESCC or the December 31st, 2016. Kaplan-Meier survival analysis and Log-rank test were used to compare the survival rates among treated and untreated patients. RESULTS: A total of 175 SD/CIS patients were enrolled and grouped by whether they received endoscopic treatment. Eleven-year cumulative incidence rates for untreated and treated SD/CIS patients were 10.7% [95% confidence interval (95% CI): 6.9-16.1] and 3.2% (95% CI: 1.4-7.0), respectively. The ESCC incidence free survival rate, and all-cause incidence and mortality free survival rates were all significantly higher in the treated patientsvs. untreated patients (P=0.043, P=0.008 and P=0.015, respectively). The ESCC mortality free survival rate showed no significant differences between the two groups (P=0.847). CONCLUSIONS: The cumulative incidence rate of SD/CIS patients to ESCC was much lower than previously reported. The Kaplan-Meier survival analysis showed that endoscopic treatment could increase the ESCC and all-cause disease-free survival rates of SD/CIS patients significantly.
OBJECTIVE: To explore the natural history of severe dysplasia/carcinoma in situ (SD/CIS) patients and to evaluate the efficacy of endoscopic treatment to SD/CIS patients. METHODS: Between January 2005 and December 2009, a population-based prospective screening program on esophageal squamous cell carcinoma (ESCC) was performed in Linzhou, China, with endoscopic screening plus iodine staining. All the eligible histologically confirmed SD/CIS patients were followed up through the door-to-door follow-up and local cancer registry. The endpoint was diagnosed as ESCC or the December 31st, 2016. Kaplan-Meier survival analysis and Log-rank test were used to compare the survival rates among treated and untreated patients. RESULTS: A total of 175 SD/CIS patients were enrolled and grouped by whether they received endoscopic treatment. Eleven-year cumulative incidence rates for untreated and treated SD/CIS patients were 10.7% [95% confidence interval (95% CI): 6.9-16.1] and 3.2% (95% CI: 1.4-7.0), respectively. The ESCC incidence free survival rate, and all-cause incidence and mortality free survival rates were all significantly higher in the treated patientsvs. untreated patients (P=0.043, P=0.008 and P=0.015, respectively). The ESCC mortality free survival rate showed no significant differences between the two groups (P=0.847). CONCLUSIONS: The cumulative incidence rate of SD/CIS patients to ESCC was much lower than previously reported. The Kaplan-Meier survival analysis showed that endoscopic treatment could increase the ESCC and all-cause disease-free survival rates of SD/CIS patients significantly.
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