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Introduction: Gastric cancer is considered as one of the most prevalent cancers, such that in our country it is on the top of prevalent cancers. Because of the high prevalence of this cancer in north of Iran, in spite of its incidence decrease in many regions of the world, we decided to determine the epidemiological and malignancy properties of gastric cancer in this region Methods: This research is a descriptive study (based on existing data). The study population consisted of gastric cancer patients referred to oncology clinic at Ramsar Imam Sajjad hospital during 2002- 2009. Necessary information was extracted from their medical files and pathology reports, and statistically analyzed. Results: In this Study, 144 patients were assessed (103 males and 47 females). In 95.8% of patients, tumor was adenocarcinoma. In 45.1% tumor was located in antrum. In 48.6% tumor was poorly differentiated. 72.9% of subjects had positive lymphatic involvement. There was metastatic involvement in 31.9% of patients, and the most common organ for metastasis was liver. 46.5% of Patients were in stage 4 at the time of referring to hospital and in 38.2% of cases tumor has been progressed to T2 Level. Conclusion: By considering this fact that most referring patients (46.5%) were in stage 4 when were diagnosed and had poorly differentiated carcinoma, it is recommended that people should consider abdominal discomfort as a serious problem and do necessary diagnostic methods especially in ages above 45 years with especial emphasis on early diagnosis of disease and reduction of death rate for at risk population.

Keywords: Gastric Cancer, Demographic, Malignancy, Risk Factor, Metastasis

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