Regardless of cancer type, cancer is considered a prothrombotic state because of tumor‐related factors such as the tumor's primary site, stage, and grade, and the patients' needs for multiple surgical interventions, frequent hospitalization, immobilization, infection, central and peripheral vascular catheters, chemotherapy such as Cisplatin, Fluorouracil, and Cetuximab, anti‐angiogenesis agents such as Bevacizumab and Sunitinib, hormonal therapy such as Tamoxifen and aromatase inhibitors, and radiotherapy.18, 19, 20, 21. This evidence concerns the gene CYP19A1 and cancer.