Breast, Chest Wall, and Thoracic Surgery Practice Test

Fibroadenoma is diagnosed most reliably by combining imaging with tissue confirmation. In young patients, ultrasound is the preferred initial test because it clearly shows the typical benign-appearing mass: well-circumscribed, oval or round, solid, and hypoechoic with smooth margins. To confirm the diagnosis histologically, a core-needle biopsy is performed; it provides representative tissue showing the fibroepithelial structure of a fibroadenoma, which helps distinguish it from other lesions such as phyllodes tumor or malignancy. Mammography alone can miss or mischaracterize lesions in dense breasts and isn’t sufficient by itself. Fine-needle aspiration often lacks the architectural detail needed for a definitive diagnosis, and MRI with spectroscopy is unnecessary for routine cases and is costly. Therefore, ultrasound to characterize the lesion followed by a core-needle biopsy for pathology is the best standard approach, with excision reserved for select situations where definitive pathology or treatment is needed.