Breast cancer (BC) is developing from cells of breast tissue and is caused by the presence of malignant cells, which are characterized by uncontrolled cell division, leading to abnormal growth (in situ carcinoma), and their ability to invade normal tissue locally. BC's diagnosis and treatment strategies have recently improved, but the incidence rates continue to increase. Worldwide, BC is the most common cancer in women. The aim of this study is to combine histological, classification, and risk factors in a small review for easy searching by clinical researchers. Currently, there are many studies on BC in Iraq or in other regions of the world. Therefore, combining these studies in one work may give an advantage in the clinical trials of BC. In conclusion, BC is the first of the ten top cancers in Iraqi women up to 2018.