DuRvalumab With chEmotherapy as First Line treAtment in Advanced Pleural Mesothelioma

Mesothelioma is a malignant tumor of the mesothelial surfaces primarily arising in the thoracic pleura. In the United Kingdom and USA the expected number of cases in the next few decades are 65,000 and 85,000, respectively. Once diagnosed, this disease is rarely cured with a median survival of less than a year.

This is an International, Open-Label, Multi-center, Phase III study. Patients will be randomized 1:1 to receive (a) chemotherapy given with durvalumab versus (b) physician's choice of either chemotherapy alone, or ipilimumab and nivolumab.

Experimental Arm:

\- Durvalumab every 3 weeks + standard chemotherapy (cisplatin or carboplatin every 3 weeks + pemetrexed every 3 weeks) for 4 to 6 cycles, followed by durvalumab every 4 weeks until disease progression, unacceptable toxicity or patient withdrawal.

Control Arm: Physician Choice

* Standard chemotherapy (cisplatin or carboplatin every 3 weeks + pemetrexed every 3 weeks) for 4 to 6 cycles followed by observation * Ipilimumab every 6 weeks and nivolumab every 2 or 3 weeks \[physician discretion\] for up to 2 years until disease progression, unacceptable toxicity or patient withdrawal .

Tumor assessments and Quality of Life (QOL) forms will be performed at baseline, then at weeks 6, 12, 18, 26, 34, 42, 50 and then every 12 weeks until disease progression. The QOL forms will also be repeated during the first visit after progression.

Mandatory pre-treatment tumor tissue sample (i.e., obtained during a previous procedure or biopsy) for research will also be required. Blood samples for research at 3 time points will be done.

The study is being led jointly by PrECOG as the US sponsor and University of Sydney as the international sponsor.