Which description best describes a benign lesion such as a fibroadenoma?

• A. Tender and fixed
• B. Well-delineated and mobile
• C. Irregular and painful
• D. Soft and fixed

Answer: (B)

Fibroadenoma is a classic benign breast mass that is usually painless, firm, and rubbery with smooth, clearly defined borders, and it can move freely under the skin. This combination—well-delineated borders and mobility—fits best because benign lesions tend to be discrete and not fixed to skin or underlying tissue. The lump can slide around because it isn’t attached to surrounding structures. In contrast, tenderness and fixation to the skin or chest wall, or an irregular and painful feel, would raise concern for inflammatory or malignant processes, and a description of being soft and fixed wouldn’t align with the typical mobile, well-circumscribed nature of a fibroadenoma.