Infarcted myxoid fibroadenoma following fine-needle aspiration.

Infarction of breast fibroadenomas is very rare and is frequently associated with physiologic changes, such as pregnancy and lactation. We report a case of an infarcted fibroadenoma following fine-needle aspiration. The patient presented with an asymptomatic breast mass, which was clinically difficult to evaluate. Excisional biopsy was performed 7 days after a nondiagnostic fine-needle aspiration of the mass. Microscopically, the nodule showed features of a classic fibroadenoma of the intracanalicular type with myxoid or mucinous stromal changes, as well as extensive areas of acute infarction. This report provides another example of the changes that may be observed in biopsy specimens obtained after fine-needle aspiration of the breast.