Breast cancer is the most common tumour in Western women, with a high incidence in the 45-55 age group. It is responsible for the death of 40,000 women each year in the United States and is the second leading cause of death in women in Western countries.Despite advances in the treatment of breast cancer as well as surgical techniques, radiotherapy and adjuvant chemotherapy, tumor recurrence and metastases continue to occur frequently. Early staging...