Overview A Study Evaluating Megestrol Acetate Modulation in Hormone Receptor Positive Advanced Breast Cancer Status: Unknown status Trial end date: 2020-09-01 Target enrollment: Participant gender: Summary This pilot trial evaluates in vivo megestrol acetate (MA) modulation of steroidal receptors in advanced breast cancer. Phase: Phase 2 Details Lead Sponsor: Instituto Nacional de Cancer, BrazilCollaborator: Cancer Research UK Cambridge InstituteTreatments: AnastrozoleExemestaneFulvestrantLetrozoleMegestrolMegestrol AcetateTamoxifen