Jong-Hyeon Jeong

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BACKGROUND In 1976, we initiated a randomized trial to determine whether lumpectomy with or without radiation therapy was as effective as total mastectomy for the treatment of invasive breast cancer. METHODS A total of 1851 women for whom follow-up data were available and nodal status was known underwent randomly assigned treatment consisting of total(More)
PURPOSE Trastuzumab is a humanized monoclonal antibody against the human epidermal growth factor receptor 2 (HER2). The clinical benefits of adjuvant trastuzumab have been demonstrated in interim analyses of four large trials. Initial data of the combined analysis of the North Central Cancer Treatment Group (NCCTG) N9831 Intergroup trial and National(More)
BACKGROUND In women with breast cancer, the role of radical mastectomy, as compared with less extensive surgery, has been a matter of debate. We report 25-year findings of a randomized trial initiated in 1971 to determine whether less extensive surgery with or without radiation therapy was as effective as the Halsted radical mastectomy. METHODS A total of(More)
PURPOSE Locoregional failure (LRF) after breast-conserving therapy (BCT) is associated with increased risk of distant disease and death. The magnitude of this risk has not been adequately characterized in patients with lymph node-negative disease. PATIENTS AND METHODS Our study population included 3,799 women randomly assigned to five National Surgical(More)
PURPOSE Patients with early-stage, hormone receptor-positive breast cancer have considerable residual risk for recurrence after completing 5 years of adjuvant tamoxifen. In May 2001, the National Surgical Adjuvant Breast and Bowel Project (NSABP) initiated accrual to a randomized, placebo-controlled, double-blind clinical trial to evaluate the steroidal(More)
PURPOSE Positive interim analysis findings from four large adjuvant trials evaluating trastuzumab in patients with early-stage human epidermal growth factor receptor 2 (HER2) -positive breast cancer were first reported in 2005. One of these reports, the joint analysis of North Central Cancer Treatment Group NCCTG N9831 (Combination Chemotherapy With or(More)
BACKGROUND Chemotherapy regimens that combine anthracyclines and taxanes result in improved disease-free and overall survival among women with operable lymph-node-positive breast cancer. The effectiveness of concurrent versus sequential regimens is not known. METHODS We randomly assigned 5351 patients with operable, node-positive, early-stage breast(More)
PURPOSE Locoregional failure after breast-conserving surgery is associated with increased risk of distant disease and death. The magnitude of this risk in patients receiving chemotherapy has not been adequately characterized. PATIENTS AND METHODS Our study population included 2,669 women randomly assigned onto five National Surgical Adjuvant Breast and(More)
PURPOSE Considerable molecular heterogeneity exists among human epidermal growth factor receptor 2 (HER2) -positive breast cancer regarding gene expression and mutation profiling. Evidence from preclinical, clinical neoadjuvant, and metastatic clinical trials suggested that PIK3CA mutational status and PAM50 intrinsic subtype of a tumor were markers of(More)
PURPOSE Patients with head and neck cancer (HNC) are at high risk of death resulting from noncancer causes and second malignancies (ie, competing mortality). Variation in competing mortality risk complicates individual treatment choices and design and interpretation of clinical studies. METHODS Using the Surveillance, Epidemiology, and End Results(More)