A recent study screening 848 primary operable breast cancer patients demonstrated that normal weight (BMI = 18-24.9 kg/m2) patients were more likely to present with HER-2+ breast cancer and overweight (BMI = 25-29.9 kg/m2) and obese (BMI > 30 kg/m2) patients with TNBC 30. This evidence concerns the gene ERBB2 and breast carcinoma.