In addition, Cardonick et al. reviewed 104 patients that received antenatal chemotherapy for breast cancer and demonstrated a 3.8% birth defect rate [9]. Taxanes may also be used in pregnancy; Mir et al. published a systematic review of 40 patients regarding taxane use in pregnancy and only reported one case of pyloric stenosis [10]. For patients with hormone receptor negative breast cancer,

dose-dense chemotherapy regimens have demonstrated improved disease-free survival over conventional dose chemotherapy in non-pregnant patients. Currently, however, the data on dose-dense chemotherapeutic agents in pregnancy is limited and should not be administered for pregnancy-associated breast cancer; Trastuzumab is a C59 wnt order well-known treatment for HER2-positive breast cancer. However, if trastuzumab must be used, it should be administered for as short of a duration as possible and surveillance of amniotic fluid levels and fetal growth should be performed [11] due to risk for oligohydramnios. Data regarding the safety of Trastuzumab in pregnancy

is lacking. Therapy with selective estrogen receptor modulators, such as tamoxifen, in patients with hormone receptor Enzalutamide positive pregnancy-associated breast cancer should be deferred until after delivery due to risks associated with craniofacial malformations and ambiguous genitalia [12]. Supportive oncological agents such as ondansetron, promethazine granulocyte colony-stimulating growth factor and erythropoietin may be safely administered during pregnancy (Table 1). The prognostic outcome in women diagnosed with breast cancer during pregnancy is conflicting. Rodriquez et al. reviewed 797 patients with pregnancy-associated

breast cancer and compared them to 4177 non-pregnant breast cancer controls [15]; after controlling for stage of disease, size of tumor, hormone receptor status, age, race, and type of surgery, Amisulpride pregnancy-associated breast cancer survival was worse compared to the non-pregnant breast cancer cohort. On the other hand, Beadle et al. evaluated 652 women with pregnancy-associated breast cancer and found no statistically significant difference in rates of recurrence, distant metastasis or overall survival compared to women who did not have pregnancy-associated breast cancer [16]. Both prospective case–control and cohort studies have reported a 20%–40% decreased risk of breast cancer in premenopausal obese patients compared to normal weight controls [17], [18], [19] and [20]. Recently, however, Cecchini et al. reported data taken from the Breast Cancer Prevention Trial (BCPT) that showed that an increased risk of invasive breast cancer was noted in overweight and obese premenopausal patients compared to patients of normal weight [21].