Parammary gland is a breast tissue that appears outside of the normal breast and is a congenital developmental abnormality. It has no normal effect on the organism (it is a wasted organ), and its incidence is about 1% to 6%, often with a tendency of family history. This disease is more common in clinical practice, mostly in adolescent and fertile females, and can also occur in males. The parammary gland is also affected by endocrine secretion like the normal breast, and can develop the same diseases as the normal breast, such as paramastitis, lobular hyperplasia, cumulus cysts, and benign and malignant tumors. Because of its hidden location, it is easy to be misdiagnosed and mistreated clinically, so it should be taken seriously. Parammary glands are usually found in the upper part of the normal breast, such as the armpit and anterior axilla, and rarely in the lower part of the normal breast, such as the abdominal wall, groin, and vulva. It is rare to find them on the face, cheeks, ears, neck, back, arms, and outer thighs, so they are also called ectopic mammary glands. What are the symptoms of parametrial gland? 1. Periodic axillary swelling and pain: Most patients feel swelling and pain in the axilla before menstruation, during pregnancy or lactation, and the pain is worse when touched, but usually it is not obvious. 2.Local lumps vary in size, mostly flattened, soft to touch, with a sense of striae. 3.Many patients have small nipples and nipple overflow: some patients have small nipples in the axilla or chest, with or without parammary gland development. If not observed, they are often mistaken for moles. Very few patients see paramecium overflow. Is surgery required for parametrial glands? Depending on the type of parametrial breast, different treatment methods may be used. For the nipple and areola type of parametrium, since there is no glandular tissue, there is no secondary disease or cancer, there are no symptoms, and it does not affect physical activity or aesthetics, it can be observed and does not require treatment. If the glandular type or complete type of parametrium is present in the armpit, the swelling and pain with the menstrual cycle, or the local lump increases in nature to be investigated, surgery should be considered to remove the parametrium to avoid the occurrence of secondary disease and cancer. Paramastectomy: The anatomy of the parammary gland is not as clear as that of the normal breast, so there is often a possibility of recurrence after paramastectomy, so the scope of surgery should be designed before surgery so that the scope of removal is sufficient to achieve complete removal. In order to completely remove the parametrium, lymphography has been used to determine the extent of parametrial excision with good results.