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[Examination of outcomes after conversion surgery for Stage IVGastric cancer in our hospital].

PURPOSE
We examined the outcomes of conversion surgery (CS) for Stage IV gastric cancer performed in our hospital.


OBJECTIVE AND METHOD
We retrospectively examined the outcomes of 5 Stage IV gastric cancer patients, for whom surgical excision was possible and CS was performed after induction chemotherapy between January 2010 and December 2013.


RESULTS
The median age of the patients who underwent CS was 62 years, and non-recovering factors were as follows: M1 (LYM) for 3 patients, H1 for 1 patient, and P1 for 1 patient. For all patients, the induction chemotherapy regimen consisted only of TS-1+cisplatin (CDDP). Using diagnostic imaging to determine treatment effect, we found that 2 patients showed a partial response(PR)as a result of the induction chemotherapy. As a result of CS, R0 surgery could be enforced to 3 cases and postoperative complications accepted neither. Ef-grade which of the histopathological judging of the chemotherapy were 1a: 4 cases, 2: 1 case. After adjuvant chemotherapy treatment in 3 patients, the median survival time (MST) of the CS patients was 22.5 months. In contrast, the MST of non-CS patients, who received treatments other than CS, was 4 months. These results indicate that the MST for CS patients was substantially longer compared to patients who did not receive CS (p=0.046).


CONCLUSION
Although CS in response to Stage IV gastric cancer fully needed to examine selection of a case, the timing of operation introduction, etc. to be successful, a possibility of contributing to a prognosis improvement in a multidisciplinary treatment was suggested.