Research in the Annals of Oncology (2007) defines the demographics of in a small cohort of Turkish women with triple-negative breast cancer. Patients with TNBC were (in comparison to those with non-triple-negative):
• younger (44 versus 47.5 years)
• premenopausal at diagnosis (70.6% versus 43.0%,)
• more likely to use oral contraceptives (35.3% versus 12.2%)
• less likely to have lymph node metastasis (29.4% versus 61.5%)
• more likely to have high-grade (grade III) tumors (52.9% versus 28.4%)
Tumor staging, status of the distant metastases, family history of breast cancer, and hormone replacement therapy were no different in the two groups..
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