Overview Study of TTC-352 in Patients With Metastatic Breast Cancer Progressing on Endocrine Therapy Status: Completed Trial end date: 2020-04-30 Target enrollment: Participant gender: Summary Phase1 study of TTC 352 for treatment of metastatic ER+ breast cancer. Phase: Phase 1 Details Lead Sponsor: TTC Oncology, LLCTreatments: Estrogens