[Cytological diagnostics of intraoperative peritoneal washes in gastric cancer.]

Diagnosis of peritoneal microcanceromatosis is the most important task allowing to determine treatment strategy for patients with stomach cancer. Laparoscopy combined with peritoneal flushing and subsequent cytological examination should be performed to detect the peritoneal microcanceromatosis at the preoperative stage. The objective of this work was to improve cytological diagnostics of peritoneal washings using immunocytochemical techniques and the cell block method. The work was carried out on the basis of 276 surgical peritoneal washings in patients with stomach cancer who were on treatment in the department of high-tech surgery of the Moscow Clinical Scientific Centre of the State Budgetary Healthcare Institution named after Loginov A.S. from June 2016 to June 2018. As a result, the optimal panel of monoclonal antibodies (Ber-EP4, CEA, CK20) was chosen, which increased the sensitivity from 52% to 96% and the specificity of cytological diagnosis from 80% to 98%, and the overall accuracy of the method from 67% to 98%.