Mammary duct dilatation 3 mm

Mammary duct dilatation of 3mm is a condition caused by endocrine abnormalities or infections in the body. It is especially common in middle-aged and elderly women. It can also easily lead to yellow secretions in the breasts and abscesses around the breasts, so it requires timely treatment and improvement.

What is the reason for breast duct dilation of 3mm?

Mammary duct dilatation of 3mm is generally caused by endocrine abnormalities, infection and other factors, and is often accompanied by plasma cell mastitis. It is very common in middle-aged and elderly women. When this happens, it is often accompanied by yellow or light yellow milk discharge, cysts or small lumps on the areola, and in severe cases, abscesses around the areola may occur. Further puncture is needed to study the pathology and rule out the possibility of malignancy. If the lesions are concentrated in the areola and central area, the purpose of cure can be achieved through wedge resection of the breast. In addition, women should pay attention to maintaining a happy mood, keeping a calm mind, not holding back, paying more attention to rest, avoiding staying up late, and not overwork in their daily lives.

Causes

Causes

There is no consensus on its cause, which may be related to ductal excretion disorders, abnormal hormone stimulation, infection and other factors.

The cause of this disease is unclear, but because it is common in middle-aged and elderly people, it may be a degenerative change related to inverted or deformed nipples, squamous epithelium extending into the inner wall of the duct, causing blockage of keratinized scales, or lipid secretions irritating the duct wall, causing inflammation, scar hyperplasia and secondary infection. Autoimmune disease is also possible, because in the later stages of the disease, it is often accompanied by plasma cell mastitis. In the pathology, a large number of plasma cell infiltrations are common, and the lesions recur repeatedly, so some people believe that it is an autoimmune disease.

Pathogenesis

The pathogenesis of mammary duct ectasia is still controversial in academia. Generally speaking, there are the following views:

1. Catheter excretion disorder:

(1) Congenital nipple deformity, depression, uncleanness or foreign hair and fibers may cause blockage of the nipple pore, abnormal duct development, poor mammary structure, epithelial hyperplasia, inflammation, injury, etc., which may cause duct stenosis, interruption or occlusion. Poor duct drainage is often the main reason for the progression of the galactorrhea stage to the lump stage.

(2) Secretions accumulate in the duct, causing duct dilatation.

(3) In some middle-aged and elderly women, due to ovarian dysfunction, the mammary ducts undergo degeneration, the duct walls relax, and the contractility of the myoepithelial cells decreases, leading to accumulation of secretions in the ducts and expansion of the duct lumen, causing this disease.

2. Abnormal hormone stimulation:

Abnormal sex hormone stimulation can induce abnormal secretion of the duct epithelium, causing the duct to dilate significantly.

Generally speaking, the presence of obstruction alone without abnormal hormonal stimulation to promote epithelial secretion will not cause duct dilatation.

3. Infection:

It may be related to anaerobic infection or areola infection.

After a more detailed study, Adai (1933) found that in the later stages of the disease, the secretions of the mammary ducts not only stimulate the ductal dilation, but also overflow from the ducts, producing chemical substances after decomposition, which cause chemical stimulation and antigenic reaction of the surrounding tissues, leading to an inflammatory reaction around the ducts characterized by plasma cell infiltration, and named it "plasma cell mastitis".