159 Outcomes of thoracic radiotherapy for oligoprogression after a response to Pembrolizumab in patients with advanced Non-Small Cell Lung Cancer. - Haron, Dhania; Phillips, Iain; Harrow, Stephen; Evans, Tamasin; MacLennan, Kirsty; Campbell, Sorcha; Mackean, Melanie; Barrie, Colin; Stares, Mark (Lung Cancer (01695002), 2024)