This is a Phase 3, prospective, multi-center, randomized, double-blind, study evaluating the efficacy and safety of LAN plus BSC versus placebo plus BSC for the treatment of well-differentiated, metastatic and/or unresectable, typical or atypical lung NETs This study contains two phases: the Double-Blind (DB) Phase, and the Open Label (OL) Extension Phase. The DB Phase includes: Screening, Baseline and Treatment period. The OL Extension Phase will consist of two periods: Treatment Period and Follow-Up Period.