[Outcomes of Staging Laparoscopy in Eight Patients with Positive Peritoneal Washing Cytology after S-1 Administration].

AIM: The aim of this study was to clarify the clinical outcomes of staging laparoscopy(SL)for patients with positive peritonealwashing cytology(CY1P0)after S-1 administration.

PATIENTS AND METHODS: Since 2007, eight CY1P0 patients who underwent SL after S-1 administration were enrolled. S-1 was administered according to the ACTS-GC and SL was performed after 8 courses of S-1 treatment.

RESULTS: SL was ended with adequate observation of intra-abdominalcavity in allthe patients with a median time of 68 minutes(range: 52-76 minutes). The timing of SL was after 8 courses of S-1 administration in 6 patients, after 11 courses in 1, and 12 courses in 1. Based on the SL results, CY0P0 was attained in 6 patients; CY1P0, in 1 and CY1P1, in 1. For the 6 patients who attained CY0P0, S-1 administration was completed. For the 2 patients who attained CY1P0 and CY1P1, chemotherapy was continued. Only 1 of the patients who attained CY0P0 had peritoneal recurrence 3 months after completion of S-1 administration.

CONCLUSION: When CY0P0 is detected by using SL, S-1 administration may be completed. More cases need to be studied to determine the suitable courses or timing of S-1 administration for CY0P0 patients.