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The patterns and timing of recurrence after curative resection for gastric cancer in China.
World Journal of Surgical Oncology 2016 December 9
BACKGROUND: The recurrence of gastric cancer after curative resection had adverse effects on patients' survival. The treatment presence varied from different countries. The aims of this study were to understand the recurrence incidence, patterns, and timing and to explore the risk factors in China.
METHODS: One thousand three hundred four patients who undergoing curative resection from more than 100 hospitals between January 1st 1986 and September 1st 2013, were surveyed in detail. Clinical pathological factors were examined as potential risk factors of each recurrence pattern using univariate and multivariate analyses. Recurrence timing was also analyzed based on disease-free survival.
RESULTS: Among 1304 gastric cancer patients, 793 patients (60.8%) experienced recurrence and 554 patients (42.5%) experienced recurrence within 2 years after operation. The median disease-free survival was 29.00 months (interquartile range [IQR] 12.07, 147.23). Receiving operation in general hospitals was one of independent risk factors of local-regional recurrence (OR = 1.724, 95% CI 1.312 to 2.265) and distant metastasis (OR = 1.496, 95% CI 1.164 to 1.940). Patients would suffer lower risk of distant metastasis if they received no more than 3 cycles adjuvant chemotherapy (OR = 0.640, 95% CI 0.433 to 0.943). Adjuvant radiotherapy could reduce the risk of recurrence (OR 0.259, 95% CI 0.100 to 0.670), especially distant metastasis (OR = 0.260, 95% CI 0.083 to 0.816).
CONCLUSIONS: More than 60% patients experienced recurrence after curative resection for gastric cancer, especially within 2 years after surgery. Risk factors were clarified between various recurrence patterns. Advanced gastric cancer and undergoing operation in general hospitals contributed to increased recurrence risk and worse survival. Enough number of lymph nodes harvest and standard D2 lymphadenectomy could reduce recurrence. Chinese patients would benefit from adjuvant chemotherapy and radiotherapy.
METHODS: One thousand three hundred four patients who undergoing curative resection from more than 100 hospitals between January 1st 1986 and September 1st 2013, were surveyed in detail. Clinical pathological factors were examined as potential risk factors of each recurrence pattern using univariate and multivariate analyses. Recurrence timing was also analyzed based on disease-free survival.
RESULTS: Among 1304 gastric cancer patients, 793 patients (60.8%) experienced recurrence and 554 patients (42.5%) experienced recurrence within 2 years after operation. The median disease-free survival was 29.00 months (interquartile range [IQR] 12.07, 147.23). Receiving operation in general hospitals was one of independent risk factors of local-regional recurrence (OR = 1.724, 95% CI 1.312 to 2.265) and distant metastasis (OR = 1.496, 95% CI 1.164 to 1.940). Patients would suffer lower risk of distant metastasis if they received no more than 3 cycles adjuvant chemotherapy (OR = 0.640, 95% CI 0.433 to 0.943). Adjuvant radiotherapy could reduce the risk of recurrence (OR 0.259, 95% CI 0.100 to 0.670), especially distant metastasis (OR = 0.260, 95% CI 0.083 to 0.816).
CONCLUSIONS: More than 60% patients experienced recurrence after curative resection for gastric cancer, especially within 2 years after surgery. Risk factors were clarified between various recurrence patterns. Advanced gastric cancer and undergoing operation in general hospitals contributed to increased recurrence risk and worse survival. Enough number of lymph nodes harvest and standard D2 lymphadenectomy could reduce recurrence. Chinese patients would benefit from adjuvant chemotherapy and radiotherapy.
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