This review article aims to address the main features of breast cancer. Thus, the general aspects of this disease have been shown since the first evidence of breast cancer in the world until the numbers today. In this way, there are some ways to prevent breast cancer, such as the woman's lifestyle (healthy eating habits and physical activities) that helps to reduce the incidence of this anomaly. The first noticeable symptom of this anomaly is typically a lump that feels different from the rest of the breast tissue. More than 80% of breast cancer are discovered when the woman feels a lump being present and about 90% of the cases, the cancer is noticed by the woman herself. Currently, the most used method for the detection of cancer and other injuries is the Magnetic Resonance Imaging (MRI) technique. This technique has been shown to be very effective, however, for a better visualization of the images, Contrast Agents (CAs) are used, which are paramagnetic compounds capable of increasing the relaxation of the hydrogen atoms of the water molecules present in the body tissues. The most used CAs are Gd3+ complexes, although they are very efficient, they are toxic to the organism. Thus, new contrast agents have been studied to replace Gd3+ complexes; we can mention iron oxides as a promising substitute.

Department of Chemistry Faculty of Science University of Hradec Kralove Hradec Kralove Czech Republic

Department of Chemistry Federal University of Lavras P O Box 3037 Lavras MG 37200 000 Brazil

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