Turns out that a new gene can be blamed now for breast cancer. According to a study published by the British Journal of Cancer this gene known as CBX2 was the most active in a subset of breast cancer patients. However experts are of the opinion that further research is required to reach a definitive conclusion. CBX2 is probably related to a many other cancers. But you cannot specifically attribute it to breast cancer yet. You need more evidence to say conclusively that over expression of CBX2 leads to breast tumour malignancy says Dr. Amit Bhargava Director Medical Oncology Nayati