A first attempt to establish a definition of oligometastatic non-small cell lung cancer by a European consensus group.

Competing Interests: Conflicts of Interest: K Haratani has received honoraria from AstraZeneca K.K. and Ono Pharmaceutical Co. Ltd.; lecture fees from AS ONE Corporation, AstraZeneca K.K., Bristol-Myers Squibb Co. Ltd., Chugai Pharmaceutical Co. Ltd., MSD K.K., and Pfizer Japan Inc.; and research funding from AstraZeneca K.K. K Nakagawa has received honoraria from Astellas Pharma Inc., AstraZeneca K.K., Bristol-Myers Squibb Co. Ltd., Chugai Pharmaceutical Co. Ltd., Clinical Trial Co. Ltd., Eli Lilly Japan K.K., MSD K.K., Nichi-Iko Pharmaceutical Co. Ltd., Nippon Boehringer Ingelheim Co. Ltd., Novartis Pharma K.K., Ono Pharmaceutical Co. Ltd., Pfizer Japan Inc., Reno. Medical K.K., and Sym Bio Pharmaceuticals Ltd.; research funding from A2 Healthcare Corp., AbbVie Inc., Astellas Pharma Inc., Bristol-Myers Squibb Co. Ltd., Chugai Pharmaceutical Co. Ltd., Daiichi Sankyo Co.Ltd., Eisai Co. Ltd., Eli Lilly Japan K.K., EP-CRSU Co. Ltd., GRITSTONE ONCOLOGY Inc., ICON Japan K.K., inVentiv Health Japan, MSD K.K., Linical Co.Ltd., Nippon Boehringer Ingelheim Co. Ltd., Novartis Pharma K.K., Ono Pharmaceutical Co. Ltd., PAREXEL International Corp., Pfizer Japan Inc., Quintiles Inc., Taiho Pharmaceutical Co. Ltd., and Takeda Pharmaceutical Co. Ltd.; and consulting or advisory fees from Astellas Pharma Inc., Takeda Pharmaceutical Co. Ltd., and Ono Pharmaceutical Co. Ltd. M Takeda has received honoraria from Ono Pharmaceutical Co., Boehringer Ingelheim Japan Inc., Novartis Pharma K.K. Chugai Pharmaceutical Co. Ltd.