a cystic tumor containing milk or a milky substance (especially in the mammary glands)

a cystic collection of milky sterile fluid

a tumour due to the locking up of milk in a greatly dilated duct

a milk-filled tumour in a blocked breast milk duct

A clogged milk duct, often associated with childbirth.

A milk-filled tumor in a blocked breast milk duct.

A clogged milk duct or a cyst filled with milk. Galactoceles sometimes form in the breast during breastfeeding.