Lactating Adenoma in the Presence of Galactoceles

1. Department of Radiology, UZ Gasthuisberg, KUL, Leuven, Belgium Background: A 22-year-old woman was referred to our department with a painless, fast growing breast mass. She noticed this mass during lactation, after giving birth to her first child. Her gynecologist palpated a large mass in the left breast, two smaller nodules in the left breast, and one small nodule in the right breast. Ultrasonography of the breasts, mammography and MRI were performed, and a tentative diagnosis of phyllodes tumor was proposed. She was subsequently referred to our centre.