Breast adenopathy with ductal dilatation is a condition in which a patient develops breast adenopathy accompanied by dilated ducts. Breast adenopathy, also known as cystic hyperplasia of the breast, is a common benign disease that occurs in the breast tissue and is associated with increased levels of estrogen in the body. The patient will have regular breast pain, which is manifested as lumps in the breast glands, and the pain occurs during the premenstrual period, which is characterized by swelling and pain, and the symptoms can be alleviated gradually after the period. Dilatation of breast ducts is mainly due to the enlargement of the ducts of the breast near the nipple and small dilatation, which can be seen by ultrasound when the dilatation is more obvious. This can be interpreted as part of breast hyperplasia, which is an enlargement of the milk ducts that can cause dilatation. It is related to the menstrual cycle, as the dilatation is more pronounced before menstruation and less so after menstruation. When a patient has symptoms of breast adenopathy with ductal dilatation, he or she needs to go to the hospital in time and be treated under the diagnosis of a doctor.