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[Effect of neoadjuvant chemotherapy (CDDP.UFT therapy) upon cell DNA analysis by flow cytometry in gastric carcinoma].

Neoadjuvant chemotherapy with CDDP and UFT was performed on far advanced gastric carcinoma cases whose curative resection was impossible. These trials were carried out on 10 patients who had Borrmann 4 type carcinoma. PR was found in 6 cases, for an efficacy rate of 60% (6/10). The DNA content in gastric carcinoma was determined before and after treatment by flow cytometry. The relationship between the change of DNA ploidy pattern and effects of chemotherapy was investigated. Aneuploidy was found in 6 of 10 patients (60.0%). DNA ploidy patterns showed no correlation with effectiveness. In aneuploid cases, the group of responders showed seemingly the change of ploidy pattern, from aneuploid to diploid. In non-responders the percentage of aneuploid cells increased. In diploid cases, an accumulation of S-phase fraction was observed in the group of responders. These results suggested that DNA ploidy analysis may provide additional diagnostic criteria for better assessment of chemotherapeutic effects.