No abstract

IntroductionEndobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA) is a pivotal test in lung cancer staging and diagnosis, mandating robust audit and performance monitoring of EBUS services. We present the first regional cancer alliance EBUS performance audit against the new National EBUS specification.MethodsAcross the five EBUS centres in the Greater Manchester Cancer Alliance, data are recorded at the point of procedure, when pathological results are available and at 6 months postprocedure to review any further pathological sampling (eg, at surgical resection) and the outcome of clinical–radiological follow-up. Outcomes across all five centres were compared with national standards for all lung cancer EBUS procedures from 01 January 2017 to 31 December 2018.Results1899 lung cancer staging or diagnostic EBUS procedures were performed across the five centres during the study period; 1309 staging EBUS procedures and 590 diagnostic EBUS procedures. Major complications were seen in six cases (<1%). All five trusts demonstrated performance above that set national standards in key metrics for both staging and diagnostic EBUS, however the provision of adequate tissue for predictive marker testing was below national standards at one trust. Across Greater Manchester, 72% and 64% of patients had their EBUS procedure performed within 7 days of referral in 2017 and 2018, respectively. Only one out of five trusts met the national targets of >85% of procedures performed within 7 days of referral.ConclusionThe National EBUS service specification is an important framework to drive the quality of EBUS services across the UK. Our data provide assurance of appropriate performance and safety while also highlighting specific areas for attention that can be addressed with the support of the cancer alliance.

Objective Rearranged ROS1, present in 1%‐2% of non‐small cell lung cancer (NSCLC) patients, usually young, never or light smokers, is assessed by fluorescence in situ hybridization (FISH) to determine eligibility for tyrosine kinase inhibitors (TKI). Immunohistochemistry (IHC) for the protein product of ROS1 rearrangement, a cost‐effective alternative, is validated on cytology and small biopsy samples. Methods From 1 March to 31 December 2019, cytology cell blocks and small biopsy samples from a selected cohort of NSCLC patients were concurrently tested for ROS1 gene rearrangement by Vysis 6q22 Break Apart FISH probe and IHC using Cell Signalling D4D6 antibody. Mismatch cases were tested by an RNA fusion next generation sequencing (NGS) panel. Results In a prospective population of 95 cases, 91 were negative and two were positive by both FISH and IHC. Both dual positive cases were female never smokers and benefited from TKI treatment. Another two cases were positive by FISH but negative by IHC and repeat by NGS showed one to be negative but one failed. Turnaround time for IHC was 0 to 8 days from request to authorisation, whilst that of FISH was 9 to 42 days at a cost of £51 and £159 respectively. Conclusion IHC to assess for the protein product of ROS1 gene rearrangement on cytology cell blocks and small biopsy samples in a routine setting is a promising screening method to assess eligibility for TKI treatment with positive and indeterminate cases confirmed by FISH or NGS as it has good negative predictive value, faster turnaround time and is cost effective, with proven technical and clinical validation.

No abstract