To retrospectively analyse the clinical features, treatment and prognosis of primary small cell carcinoma of the esophagus (ESCC) from our one institution within the past 20 years. From May 1985 through June 2005, 131 cases of SCEC were histopathologically diagnosed,accounting 1.2% of all diagnosed esophageal cancer cases of the institution . Pretreatment staging included medical history, physical examination in detail, chest x-ray, barium swallow, and chest and up abdominal CT scan abdominal ultrasound, blood rutin, blood biochemistry analyses including liver and renal function evaluation. Brain MRI and bone ECT scan were performed only in cases with suspected symptoms.118 cases were pathologically proved as ESCC from endoscope or surgical samples and 13 cases were diagnosed by cytology. The stage system of the American Joint Committee of Cancer (sixth Edition) was used. The methods of the Kaplan-Meier and Log-rank test were used for estimations and comparison of the median survival times(MTS)and overall survival rates (OS). The SPSS 10.0 software was adopted to forward analyse the prognostic factors by the model of Cox Regression with a entry probability for stepwise of 0.05 and removal one of 0.10. For all the 131 cases, the median age was 58 years old(33–82), with male-female ratio of 3.5:1. The clinical symptoms, signs as well as radiographs were similar to those of squamous-cell carcinoma of the esophagus. Fifty-three cases only received regional treatments or systematic chemotherapy (S ,R ,C ,S+R),78 cases received combined systematic chemotherapy with regional treatments (S+C, R+C, S+R+C). Through a median follow-up of 13 months(0.3–165months),111 cases had died, 10 cases were alive,10 cases were lost(8%). TNM stage (P=0.000) ,T stage(P=0.026), systematic chemotherapy(P=0.000) and radiotherapy(P=0.021) were identified as independent prognostic factors by multivariate analysis. The treatment results by stages were displayed in table 1. For the all group, the MST (95%CI), 1-year,2-year,3-year and 5-year OS (±S.E.)were 13 months (10–15 months), 51%±4%, 26%±4%,17%±3% and 13%±3%, respectively. The difference in OS between multi-modality therapy and mono-modality therapy were statistically significant(P=0.0004).Tab.1Stage and treatment results of SCECStageNo. of PtsMST (m)3-Year OS(%)I102946IIa202947IIb121633III50117IVa1469IVb2570 Open table in a new tab SCEC is similar to small-cell lung cancer (SCLC) in histopathology and biologic behavior. Systematic chemotherapy combine with local-regional treatments (radiotherapy and/or surgery) are considered as standard care for cases with early stage disease.
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