Definitions:

1. A benign breast cyst filled with milk or a milky fluid, typically occurring in lactating women or shortly after breastfeeding has ended. NOUN
   • The doctor diagnosed the lump in her breast as a galactocele after an ultrasound examination.
2. A benign breast cyst, caused by the blockage of a milk duct, leading to the accumulation of milk in a localized area of the breast. NOUN
   • A galactocele typically resolves on its own but can be drained if it becomes uncomfortable.

Synonyms:

• lacteal cyst
• milk cyst