Background: Breast cancer is the malignancy in humans and other mammals. Several risk factors are involved in their appearance such as higher hormone levels and obesity. Identification of a mouse mammary tumor virus supports a viral etiology for breast tumors in animals. Viruses have been implicated in the development of various cancers, but viral induction for formation breast cancer is contro...

Introduction: Of the factors leading to false negative results in mammography is breast tissue density, and by increasing the density of breast tissue in mammography, the mammography sensitivity decreases. On the other hand, increasing the breast tissue density leads to increased risk of breast cancer. Various factors such as inheritance, genetics, hormonal and reproductive factors, and nutriti...

although most breast cancers are adenocarcinomas of the mammary gland, primary breast sarcomas may also arise from mammary gland mesenchymal tissue. sarcomas represent less than 1% of primary breast neoplasms. these tumors are at high risk of recurrence and are known to have poor prognosis. surgical resection is the primary treatment for these lesions and axillary lymph node dissection is not r...

hamartoma of the breast is a rare benign breast lesion which is unfamiliar to most clinicians, although the mammographic features are usually characteristic. hamartomas are composed of ducts, lobules, fat and fibrous tissue. these benign lesions are likely to be increasingly diagnosed because of routine screening and hence clinical awareness is paramount to prevent these lesions from being over...

primary breast sarcoma is a rare disease of the breast that comprises a heterogeneous group of malignant mesenchymal neoplasms, including angiosarcoma, liposarcoma, leiomyosarcoma, fibrosarcoma, sarcomas with bone and cartilage, and malignant fibrous histiocytoma. yet the exact incidence of primary breast sarcoma has not been reported, but it approximately accounts for less than 1% of all breas...

accounts for 27% of all cancers. according to the national cancer institutes' reports, the risk of breast cancer among american women is 13%. the current study aims to evaluate the level of risk perception of breast cancer and to identify its related factors amongst female employees. methods: this project was a cross-sectional study and participants were female employees working in hospitals an...