Surgery vs. No Surgery for Primary Tumor in De Novo Stage IV Breast Cancer With Solitary Bone Metastases

Conditions : Breast Cancer; Stage IV Breast Cancer; Bone Metastases Interventions : Procedure: Primary Tumor Resection; Other: Standard systemic therapy Sponsors : West China Hospital; The Second Affiliated Hospital of Hunan University of Traditional Chinese Medicine; The First Affiliated Hospital of Zhengzhou University; The Nineth Hospital of Shenzhen, Longgang Center Hospital; Baotou Cancer Hospital; Hebei General Hospital; General Hospital of Ningxia Medical University; The First Hospital of Jilin University; Tangshan People's Hospital; Guangdong Women and Children Hospital; Nanchang People's Hospital; Cancer Hospital of Guangxi Medical University; Xinjiang Medical University Cancer Hospital; Anyang Tumor Hospital; The First Affiliated Hospital of Hunan University of Traditional Chinese Medicine; Shanxi Bethune Hospital; Hebei Medical University Fourth Hospital; The Affiliated Hospital of Qingdao University; Suzhou Municipal Hospital; Zhejiang Provincial People's Hospital; Hunan Cancer Hospital; Union Hospital, Tongji Medical College, Huazhong University of Science and Technology; Shanxi Province Cancer Hospital; The First Hospital of Lanzhou University, Gansu, China; Lanzhou University Second Hospital Not yet recruiting