title: The clinicopathological features and prognostic factors of gastric squamous cell carcinoma.
abstract: Primary gastric squamous cell carcinoma (SCC) is an exceedingly rare disease. We increased the understanding of gastric SCC and evaluated prognostic factors of gastric SCC.In this large-population cohort study, we retrospectively collected 163 primary gastric SCC and 66,209 primary gastric adenocarcinoma cases from the surveillance, epidemiology, and end results program (SEER) database from 1988 to 2012. The Chi-squared test demonstrated the distributed differences. Cox proportional hazards regression model was used to evaluate the prognostic factors.Gastric SCC accounted for 0.2% of all the primary gastric cancer cases. The mean age of patients with gastric SCC was 69.6 years old, and the man-to-woman ratio was 2.3:1. The proportion of black was higher in gastric SCC than gastric adenocarcinoma (P < 0.001). Almost half of the gastric SCCs were diagnosed in stage IV and more than half were poorly differentiated. In gastric SCC, the median survival was 8.0 months and the 5-year overall survival (OS) was 32.7%; in gastric adenocarcinoma the median survival rate was 19.0 months and the 5-year OS was 35.4%. The multivariate analysis showed that number of primary lesions, tumor location, grade, and stage were independent prognostic factors in gastric SCC. The tumor stage was the most important prognostic factor.Primary gastric SCC is exceedingly rare. Compared with gastric adenocarcinoma, gastric SCC was more frequent in black patients and was usually diagnosed when it was poorly differentiated and at a later stage. On the whole, gastric SCC has a poorer outcome. Disease stage is likely a key determinant in survival.
authors: Department of Medical Oncology Department of Surgical Oncology Cancer Institute (Key Laboratory of Cancer Prevention and Intervention, Chinese National Ministry of Education; Key Laboratory of Molecular Biology in Medical Sciences, Zhejiang Province, China), The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, China.
authors: Caixia
authors: C
authors: Dong
authors: Mengjie
authors: M
authors: Jiang
authors: Yinuo
authors: Y
authors: Tan
authors: Yiyao
authors: Y
authors: Kong
authors: Ziru
authors: Z
authors: Yang
authors: Chenhan
authors: C
authors: Zhong
authors: Dan
authors: D
authors: Li
authors: Ying
authors: Y
authors: Yuan
mesh_terms: D000328:Adult; D017677:Age Distribution; D000368:Aged; D000369:Aged, 80 and over; D002294:Carcinoma, Squamous Cell / Q000000981:diagnostic imaging / Q000453:epidemiology* / Q000401:mortality; D015331:Cohort Studies; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D011379:Prognosis; D016016:Proportional Hazards Models; D012189:Retrospective Studies; D018426:SEER Program; D017678:Sex Distribution; D013274:Stomach Neoplasms / Q000000981:diagnostic imaging / Q000453:epidemiology* / Q000401:mortality; D014481:United States / Q000453:epidemiology