Prognostic factors associated with survival in a large cohort of gastric cancer patients resected over a decade at a single Italian center: the Cremona experience.

BACKGROUND: Incidence of gastric cancer (GC) shows different distribution in Italy, with higher incidence in the north and center. We retrospectively analyzed the clinical data of patients resected at the Hospital of Cremona between January 2007 and December 2016. Available clinical variables were linked with survival to identify possible prognostic factors. MATERIALS AND METHODS: Variables analyzed were age, sex, type of surgery, site, histology, invasion, nodal status, resection margins, grade, HER2 status, Helicobacter pylori infection (neo)adjuvant chemotherapy, adjuvant chemoradiotherapy, neutrophil-to-lymphocyte ratio, number of nodes removed and type of lymphadenectomy. Overall survival (OS) was estimated by the Kaplan-Meier method and differences between groups by the log-rank test. Data on OS were analyzed by Cox regression and the final model was obtained using the step-wise method. RESULTS: 379 patients were considered, out of which 195 were operated from 2007 to 2011 and 184 from 2012 to 2016. Median follow-up was 25.5 months, median OS 31.3 months and time to recurrence 23.2 months. D2 resection rate increased from 36% (period 2007-2011) to 74% in 2012-2016 (p = 0.01) with a higher mean number of nodes collected (20.98 for 2007-2011 and 23.53 for 2012-2016, p = 0.040). Only 37% of patients received a postoperative treatment. At multivariate analysis, variables associated with OS were age (p = 0.002), stage (p < 0.001), resection margins status (p < 0.001), adjuvant chemotherapy (p < 0.010) and tumor location (cardia vs non-cardia) (p = 0.029). CONCLUSIONS: Our analysis shows that completeness of resection and lower stage are strong predictors of long-term survival in GC, providing the rationale for adjuvant and neoadjuvant approaches (chemotherapy, radiotherapy or combined). Cardial GC has worse prognosis compared to distal cancers. TRIAL REGISTRATION NUMBER: Service evaluation number 256, protocol 16821/17, date 05 June 2017.

Epidemiological, clinical and pathological characteristics of gastric neoplasms in the province of Cremona: the experience of the first population-based specialized gastric cancer registry in Italy.

BACKGROUND: The gastric cancer incidence rate differs widely across geographical areas. In Italy, in the province of Cremona the incidence is high, compared to the national situation. For this reason a specialized population-based registry was set up. METHODS: The collection encompasses all gastric cancers diagnosed in the three districts of the province since January 1, 2010. The main data sources were the pathological and Hospital Discharge Records and patient clinical charts. Only diagnoses of primary gastric cancer were considered. For each case the following variables were registered: personal data, medical history and symptoms at diagnosis; imaging assessments performed, details on surgery and other treatments received; genetic background and biomolecular characteristics; social and environmental factors. RESULTS: As of November 2017, 1087 cases were collected; of which 876, diagnosed up to December 2015, were analyzed. Male/female ratio was 1.4. The European Age-standardized Incidence Rate was 41.4 for males and 28.3 for females as compared to a national average of 33.3 and 17.0 respectively. Median age at diagnosis was 73 for male and 78 for female. Helicobacter Pylori infection was present in fewer than 20% of cases. HER-2 gene was amplified in about 25% of cases. Primary tumour location was the gastro-esophageal junction or cardia in 17.5% in males and 8.3% in females. The majority of cases (58.3%) were diagnosed at an advanced stage and overall only 41.2% underwent surgery. Median overall survival was 14.8 months for men and 18.5 for women. Age standardized 5-year relative survival was 31.4% for men and 40.5% for females. Neoadjuvant treatment was performed in fewer than 10% of patients who underwent surgery, and the rate of postoperative therapy adherence was low. DISCUSSION: This study shows a high gastric cancer incidence in the province of Cremona, with a geographical spread across different districts. Moreover, a high percentage of gastric cancers were detected at an advanced stage of disease and a low rate of 5-year relative survival was registered. Based on these findings, effective preventive interventional health strategies and screening procedures need to be implemented to reduce the impact of this pathology in this geographical area.