Abstract: Objective To explore the feasibility of EGFR, KRAS and PIK3CA mutation analysis on rapid on-site evaluation (ROSE) cytological slides in patients with non-small cell lung cancer and its clinical value. Methods Seventy-five cases of ROSE cytological slides and paired histological specimens were collected in Tianjin Medical University General Hospital. xTAG70plex liquidchip technology was used to analyze the gene mutations of the samples. Results The KRAS mutation was found in histological specimen but not in ROSE cytological slides in one case. The mutation results were the same in histological specimen and ROSE cytological slides in other cases. The consistent rates of the EGFR mutation and KRAS mutation were 100% and 98.7%, respectively. Conclusion Our study demonstrates that xTAG70plex liquidchip technology can be used for the mutation analysis of EGFR, KRAS and PIK3CA genes in non-small cell lung cancer on ROSE cytological slides.

Key words: carcinoma, non-small-cell lung, mutation, histocytological preparation techniques, DNA mutational analysis, rapid on-site evaluation