A Phase III, Randomized, Double-Blind, Placebo-Controlled Study of Vemurafenib (RO5185426) Adjuvant Therapy in Patients With Surgically Resected, Cutaneous BRAF-Mutant Melanoma at High Risk for Recurrence

This multicenter, randomized, double-blind, placebo-controlled study will evaluate the efficacy and safety of vemurafenib in participants with completely resected, cutaneous BRAF mutation-positive melanoma at high risk for recurrence. Participants will be enrolled in two separate cohorts: Cohort 1 will include participants with completely resected Stage IIC, IIIA (participants with one or more nodal metastasis greater than \[\>\] 1 millimeter \[mm\] in diameter), or IIIB cutaneous melanoma, as defined by the American Joint Committee on Cancer (AJCC) Classification, Version 7; Cohort 2 will include participants with Stage IIIC cutaneous melanoma, as defined by this classification scheme. Within each cohort, participants will be randomized (1:1 ratio) to receive vemurafenib or matching placebo over a 52-week period.