This study will investigate whether liquid based cytology specimens are a feasible alternative to formalin-fixed paraffin embedded histology samples for detection of epidermal growth factor receptor (EGFR) mutations in lung adenocarcinoma using the Biocartis Idylla platform. The Biocartis Idylla is a fully automated, real-time PCR based molecular diagnostics system. The Idylla carries out the entire analytical process from sample to result. This study will be based in the cytology department at Royal Cornwall Hospital as part of a service improvement. It will use residual material from existing samples sent to the laboratory as part of the routine service. It will use existing material from patients diagnosed with lung adenocarcinoma by cytology using the current, validated procedure which uses formalin-fixed paraffin embedded (FFPE) samples over a 10 month period. EGFR mutation results obtained using the validated procedure (formalin fixed paraffin embedded) will be compared to those produced using liquid based cytology samples.
Description: The relative sensitivity and specificity will be calculated. Significance of use of liquid based cytology samples will be calculated using McNemars chi-squared test.Measure: Significance of using liquid based cytology samples for EGFR mutation detection using the Idylla platform (in comparison to the use of FFPE samples) Time: 10 months
There is one SNP
This faster pathway would be beneficial in cases of already confirmed adenocarcinoma for second line EGFR treatment testing (T790M) and in cases where the residual cytology sample, that would normally be discarded, can be utilised for testing, optimising the potential of the sampling. --- T790M ---