Overview Gynecomastia Extension Study Status: Completed Trial end date: 2002-10-01 Target enrollment: Participant gender: Summary The purpose of this study is to look at the effect of anastrozole (ZD1033, Arimidex™) in reducing gynecomastia in pubertal boys treated with placebo in Trial 1033US/0006 (another anastrozole study). Phase: Phase 3 Details Lead Sponsor: AstraZenecaTreatments: Anastrozole