This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Breast, Subject name: Surgery
During a routine screening mammography, a 62-year-old teacher is informed that she has changes on her mammography, and she should consult her physician. She can be reassured that the findings that indicate a benign condition are which of the following? 
Select and explain. 
A. Discrete, stellate mass, B. Fine, clustered calcifications, C. Coarse calcifications, D. Solid, clearly defined mass with irregular edges
C: Coarse calcifications
Answer: C: Coarse calcifications 
Explanation: Coarse calicfications are usually benign. Fine, clustered califications are often milignant and require biopsy. Solid tumors of the breast, especially those that have increased in size or have changed in appearance, are suspicious for carcinoma and require biopsy.