This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Women Imaging, Subject name: Radiology
[{'content': 'Investigation to differentiate between a scar tissue and residual/recurrence of a breast tumor is \nSelect and explain. \nA. USG, B. Mammography, C. MRI, D. All of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ix for differentiating scar Vs residual / recurrence of Ca Breast- CE-MRI Breast scar Post-surgical breast scar is a benign complication that usually occurs following surgical intervention to breast tissue. It can, however, be a strong and potentially very confusing mimicker of breast malignancy. Residual breast tumor It is a remaining poion of the original primary breast cancer after incomplete resection or following radiotherapy or chemotherapy. Residual Breast Tumor shows contrast enhancement but scars donot enhance on a Contrast Enhanced Mri', 'role': 'assistant'}]