Adenocarcinoma/diagnostic imaging; Androgen Antagonists/pharmacology; Androgens; Antigens, Neoplasm/biosynthesis; Antigens, Surface/biosynthesis; Antineoplastic Agents, Hormonal/pharmacology; Glutamate Carboxypeptidase II/biosynthesis; Neoplasms, Hormone-Dependent/diagnostic imaging; Orchiectomy; Positron-Emission Tomography/methods; Prostatic Neoplasms/diagnostic imaging; Adenocarcinoma/drug therapy; Adenocarcinoma/metabolism; Adenocarcinoma/secondary; Androgen Antagonists/therapeutic use; Antigens, Neoplasm/analysis; Antigens, Surface/analysis; Antineoplastic Agents, Hormonal/therapeutic use; Bone Neoplasms/diagnostic imaging; Bone Neoplasms/secondary; Clinical Trials as Topic; Gene Expression Regulation, Neoplastic/drug effects; Glutamate Carboxypeptidase II/analysis; Gonadotropin-Releasing Hormone/agonists; Gonadotropin-Releasing Hormone/antagonists & inhibitors; Humans; Ligands; Male; Neoplasms, Hormone-Dependent/drug therapy; Neoplasms, Hormone-Dependent/metabolism; Prostatic Neoplasms/drug therapy; Prostatic Neoplasms/metabolism; Prostatic Neoplasms, Castration-Resistant/diagnostic imaging; Prostatic Neoplasms, Castration-Resistant/metabolism; Receptors, Androgen/drug effects; Receptors, Androgen/physiology