Table 1. Evidence based guidelines for PCI in ES-SCLC.

Organization	Most recent year updated	Position on PCI for ES-SCLC
European Society of Medical Oncology	2013	PCI recommended, Grade IA
American College of Chest Physicians	2013	PCI recommended, Grade IB
American Society of Clinical Oncology	2015	PCI recommended, Grade IB
National Comprehensive Cancer Network	2020	Consider PCI or MRI surveillance
American Society of Radiation Oncology	2019	Consider PCI or MRI surveillance

PCI, prophylactic cranial irradiation; ES-SCLC, extensive stage small cell lung cancer.