Galactoceles (milk retention cysts) are cystic collections of fluid, usually caused by an obstructed milk duct. These present as soft cystic masses on physical examination. At mammography, galactoceles may appear as indeterminate masses, unless the classic fat-fluid levels are seen. Ultrasound may show a complex mass. The diagnosis can be made based on the clinical history and aspiration, which yields a milky substance. Once the diagnosis is established, excision is not necessary, and there is no increased risk of subsequent breast cancer.