Mesothelioma

Confocal Laser Endomicroscopy in Pleural Malignancies

Purpose:To date, the different biopsy methods, such as CT-guided pleural biopsy, mediastinal biopsy, endosonography and thoracoscopy have their limitations in diagnosing pleural malignancies, such as mesothelioma. Sampling errors frequently occur resulting in the common histological finding of ‘non-specific pleuritic/fibrosis’, which presents a great uncertainty for clinicians and patients. Confocal laser endomicroscopy (CLE) provides real-time imaging on a cellular level, however data of CLE in pleural malignancies are lacking.

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Accelerated Hypofractionated Radiotherapy in the Treatment of Malignant Pleural Mesothelioma (MesoRT)

Purpose:This is a monocentric prospective study of radiotherapy using accelerated hypofractionation with Tomotherapy in Malignant Pleural Mesothelioma (MPM) patients after pleurectomy / decortication (P / D) or biopsy. The treatment will be delivered using Tomotherapy, that allows to adopt dose accelerated hypofraction criteria. Treatment duration is 5 consecutive days.

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Atezolizumab, Pemetrexed Disodium, Cisplatin, and Surgery With or Without Radiation Therapy in Treating Patients With Stage I-III Pleural Malignant Mesothelioma

Purpose: This phase I pilot trial studies how well atezolizumab, pemetrexed disodium, cisplatin, and surgery with or without radiation therapy in treating patients with stage I-III pleural malignant mesothelioma. Monoclonal antibodies, such as atezolizumab, may interfere with the ability of tumor cells to grow and spread. Pemetrexed disodium may stop the growth of tumor cells by blocking some of the enzymes needed for cell growth. Drugs used in chemotherapy, such as cisplatin, work in different ways to stop the growth of tumor cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. Giving atezolizumab, pemetrexed disodium, and cisplatin before surgery may make the tumor smaller and reduce the amount of normal tissue that needs to be removed. Giving atezolizumab after surgery may kill any remaining tumor cells.

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CheckpOiNt Blockade For Inhibition of Relapsed Mesothelioma (CONFIRM)

Purpose:The UK has the highest incidence of mesothelioma. The incidence has risen by 497% since the late 1970’s and is increasing worldwide due to continued mining and use of asbestos. For patients with mesothelioma who have relapsed after taking pemetrexed and cisplatin, there is currently no standard treatment, making this an urgent unmet need. Recent trials in this area have not found an effective treatment that improves overall survival.

Following a debate in the House of Lords, a national survey assessing the research priorities in mesothelioma found that ‘exploiting the potential of immunotherapy’ was a top priority. This trial was designed in response to that survey. It uses the immunotherapy agent nivolumab which blocks programmed cell death 1 (PD-1) receptor on activated T-cells (a type of white blood cell forming part of the immune system). Early research has found a dependency of mesothelioma on the PD-1 checkpoint. By attaching to PD-1, nivolumab blocks its action (checkpoint inhibition), preventing it from turning off the T-cell, and therefore allowing the immune system to work. PD-1 checkpoint inhibition has revolutionised the treatment of melanoma and it is hoped to be as effective in mesothelioma.

This trial is a randomised, double blind placebo controlled trial of patients with mesothelioma who are third relapse following a platinum based chemotherapy treatment. Patients will be randomised in a 2:1 ratio (nivolumab: placebo).

336 patients will be recruited from 25 UK centres over a four-year period with the last patient having a minimum of 6 months follow up. All patients will be on treatment for 12 months unless they progress or withdrawal prior to this. Clinic visits will occur every 12 weeks, mirroring standard care. Data following progression will be obtained from the NHS Information Centre.

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