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J. Edwards
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MINI 25 - Trials, Radiation and Other (ID 142)
- Event: WCLC 2015
- Type: Mini Oral
- Track: Thymoma, Mesothelioma and Other Thoracic Malignancies
- Presentations: 1
- Moderators:J.M. Clavero, R. Hassan
- Coordinates: 9/08/2015, 16:45 - 18:15, 702+704+706
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MINI25.15 - Discussant for MINI25.11, MINI25.12, MINI25.13, MINI25.14 (ID 3432)
18:05 - 18:15 | Author(s): J. Edwards
- Abstract
- Presentation
Abstract not provided
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ORAL 05 - Surgery (ID 97)
- Event: WCLC 2015
- Type: Oral Session
- Track: Treatment of Locoregional Disease – NSCLC
- Presentations: 1
- Moderators:P. Van Schil, F.(. Kong
- Coordinates: 9/07/2015, 10:45 - 12:15, 201+203
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ORAL05.02 - Quality of Resection in Pathological N2 NSCLC in the Phase 3 Lung Adjuvant Radiotherapy Trial (Lung ART): An Important Factor (ID 1001)
11:16 - 11:27 | Author(s): J. Edwards
- Abstract
- Presentation
Background:
The main objective of the ongoing phase III Lung Adjuvant Radiotherapy Trial (Lung ART) is to study the impact of post-operative conformal radiotherapy (PORT) on disease-free survival (DFS) in a population of patients with completely resected pathologically proven N2 non-small cell lung cancer (NSCLC), with or without induction or adjuvant chemotherapy. Quality of surgical resection and extent of lymph node dissection are critically important in the interpretation of results.
Methods:
A surgical advisory committee composed of 4 international expert thoracic surgeons meets regularly in order to establish the quality of resection, taking into consideration the International Association for the Study of Lung Cancer and European Society of Thoracic Surgeons published guidelines. The committee reviews anonymized surgical and pathological reports, and establishes whether tumor resection can be considered complete (no residual tumor and adequate lymph node assessment), uncertain (highest mediastinal nodal station involved, incomplete nodal exploration, involved N2 removed in fragments) or incomplete (presence of residual tumor). Nodal exploration is evaluated according to recommendations and classified as sampling, selective dissection or extensive dissection.
Results:
As of April 15th 2015, 298 patients have been included in the Lung ART trial and 116 patients’ reports have been analyzed by the surgical advisory committee. The basic characteristics are specified in the following table:
Nodal dissection was performed according to lobar location specific recommendations in most patients: for instance, station 7 was explored in 91% patients and right inferior paratracheal station 4R in 93% of right side tumours. Nodal dissection was performed according to recommendations in 71% pts; 16% patients had sampling, 22% a selective dissection and 62% a systematic dissection. Resection was considered complete (R0) in 43%, uncertain in 42%, microscopically incomplete (R1) in 14% and macroscopically incomplete (R2) in 1 patient. The most frequent reason for “uncertain resection” was involvement of the highest mediastinal lymph node.Total n=116 Frequency Percent Induction chemotherapy no 89 77% yes 27 23% Type of surgery for right-side tumors 70 60% lobectomy 49 70% bilobectomy 9 13% pneumonectomy 5 7% other 7 10% for left-side tumors 46 40% lobectomy 34 74% pneumonectomy 10 22% other 2 4% Tumor Size (mm) Median size (range) 35 [0*-105] Number of mediastinal lymph nodes examined Median number (range) 10 [1-37] Number of mediastinal lymph nodes involved Median number (range) 1[0*-15] Number of mediastinal nodal stations involved 0* 5 4% 1 79 68% 2 20 17% >2 12 11% * patients with downstaging after induction chemotherapy
Conclusion:
Most adjuvant trials have included completely resected patients, without monitoring of the quality of nodal exploration and resection. This analysis outlines the importance of an external committee evaluating the quality of resection in stage IIIA-N2 NSCLC, and the findings of this audit will be useful in the interpretation of the results of the trial.
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ORAL 14 - Biology 2 (ID 112)
- Event: WCLC 2015
- Type: Oral Session
- Track: Thymoma, Mesothelioma and Other Thoracic Malignancies
- Presentations: 1
- Moderators:T. Nakano, P. Baas
- Coordinates: 9/07/2015, 16:45 - 18:15, 702+704+706
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ORAL14.06 - MesobanK - an International Mesothelioma Tissue Bioresource - Now Open for Tissue Requests (ID 988)
17:39 - 17:50 | Author(s): J. Edwards
- Abstract
- Presentation
Background:
Availability of quality assured, fully annotated mesothelioma tissue collected to rigorous standard operating procedures (SOPs) to facilitate basic and translational research is very limited. MesobanK, funded by the British Lung Foundation and the Mick Knighton Mesothelioma Research Fund, is a UK based bioresource to collect fresh tissue, blood, pleural fluid and anonymised linked clinical data to strict SOPs from patients with malignant pleural mesothelioma.
Methods:
1) To construct a tissue microarray (TMA) from 1000 cases of formalin fixed paraffin embedded pleural mesothelioma tissue linked to a clinical data set. Each case will have several cores taken to allow for tumour heterogeneity. 2) To collect 300 cases of fresh pleural mesothelioma tissue (5 samples per case), blood (whole blood, serum, plasma and buffy coat) and pleural fluid (supernatant and cell pellet) linked to a clinical data set. Longer term follow up and survival data will be provided by the UK National Cancer Registration Service. 3) To develop at least 20 new fully characterised and annotated mesothelioma cell lines. Governance MesobanK abides by all relevant UK and EU legislation regarding the collection of tissue and data. Mesobank is a member of the UK Confederation of Cancer Biobanks. Prioritisation for access to samples will be based solely on scientific merit. The project is managed by a dedicated project manager and overseen by a Steering Committee; an independent Scientific Advisory Board reviews anonymised applications for samples.
Results:
All required ethical permissions have been obtained. A secure, web-based multi-user database has been constructed for data collection. As of April 2015, 730 of the 1000 cases for the TMA have been acquired from UK pathology departments and the first part of the TMA construction is underway at the Cancer Research UK Cambridge Institute. In the first year of operation, 100 prospective cases have been banked and quality control to assess tumour percentage and necrosis in each sample is underway. Figure 1 shows weight of sample versus tumour percentage from the QC of the first 144 samples. Twenty six new cell lines have been developed and are currently being characterised. Figure 1
Conclusion:
Procurement of formalin fixed tissue for the TMA and fresh biospecimens is progressing well and MesobanK is now open for investigators to apply for tissue samples. Enquiries about tissue availability should be directed to [email protected]. An application form is available at www.mesobank.com. A cost contribution model has been developed to support on-going funding of MesobanK.
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