The Santarém Senology Unit (USS) was founded in 1998. It is responsible for the prevention, diagnosis, treatment and follow-up of patients with breast disease, currently treating 180 new cases/year of breast cancer. We have a multidisciplinary team (gynaecologists dedicated to breast surgery, radiologists, pathologists, medical oncologists, radiotherapists, plastic surgeons, specialized nurses, etc...) with specific training in the field of breast care. We have modern and innovative diagnostic and therapeutic technologies. We have been pioneers in breast cancer treatment in 'one-day surgery' (conservative surgery and, more recently, in selected cases, mastectomy with sentinel lymph node biopsy). The instituted therapeutics reflect the use of national and international guidelines, adapted to each patient. The care of excellence provided by the professionals of the Breast Unit of Santarém reflects the standards of quality and well-being provided to our patients.