Proteus: This phase III trial is evaluating an oral prostate cancer treatment (Apalutamide) in patients with high risk, localised or locally advanced prostate cancer who are eligible for surgeryA Randomized, Double-blind, Placebo-controlled, Phase 3 Study of Apalutamide in Subjects With High-risk, Localized or Locally Advanced Prostate Cancer Who Are Candidates for Radical Prostatectomy

Exclusion

• Distant metastasis based on conventional imaging (clinical stage M1). Nodal disease below the iliac bifurcation (clinical stage N1) is not an exclusion. Diagnosis of distant metastasis (clinical M stage; M0 versus M1a, M1b, M1c) and pelvic nodal disease (clinical N stage; N1 versus N0) will be assessed by central radiological review. Participants are considered eligible only if the central radiological review confirms clinical stage M0
• (a) Prior treatment with androgen receptor antagonists; (b) Treatment with gonadotropin-releasing hormone analog (GnRHa) prior to informed consent form (ICF) signature
• History of prior systemic or local therapy for prostate cancer, including pelvic radiation for prostate cancer
• Use of any investigational agent less than or equals to (<=)4 weeks prior to randomization or any therapeutic procedure for prostate cancer at any time
• Major surgery <=4 weeks prior to randomization
• Any of the following within 12 months prior to first dose of study drug: severe or unstable angina, myocardial infarction, symptomatic congestive heart failure, arterial or venous thromboembolic events (example, pulmonary embolism, cerebrovascular accident including transient ischemic attacks), or clinically significant ventricular arrhythmias or New York Heart Association Class II to IV heart disease; uncomplicated deep vein thrombosis is not considered exclusionary