This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology and breast, Subject name: Surgery
[{'content': 'Investigation of choice for High-risk breast cancer in female is \nSelect and explain. \nA. MRI, B. CT-PET, C. Mammography, D. USG', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Magnetic resonance imaging (MRI) of the breast is useful in a number of settings:To distinguish scar from recurrence in women who have had previous breast conservation therapy for cancer (although it is less accurate within 9 months of radiotherapy because of abnormal enhancement).To assess multifocality and multicentricity in lobular cancer and to assess the extent of high-grade ductal carcinoma in situ (DCIS). It is less useful in low-grade DCIS.It is the best imaging modality for the breasts of women with implants.As a screening tool for high-risk women (because of family history).Ref: Bailey and Love, 27e, page: 862', 'role': 'assistant'}]