The upper boundary of the chest is the lower boundary of the neck, the lower boundary is the lower opening of the bony thorax, and the outer boundary is the front and rear edges of the deltoid muscle. It is the second largest part of the human body cavity. The characteristics of the superficial and deep fascia of the chest wall, the distribution and communication relationship of the superficial veins, the distribution of the cutaneous nerves, and the structure of the proper chest wall. So, does chest development only occur in girls? Is the chest development of little boys normal? Let us learn more about it in detail through the following article. Male breast hyperplasia is called gynecomastia. It often occurs before and after puberty and in old age. The pathological manifestation is duct hyperplasia without alveolar hyperplasia. It can be generally divided into two categories: primary and secondary. It usually occurs in adolescent boys and elderly men. It is mainly caused by a transient increase in endogenous estrogen or a decrease in androgen, and it can often disappear on its own. Secondary cases are common in liver disease, testicular disease, adrenal disease, thyroid disease, diabetes, tumors of the urogenital system or nervous system, prostate disease, long-term use of estrogen, or other diseases, long-term use of some drugs, such as reserpine, remifentanil, digitalis, chlorpromazine, etc., which can also cause breast development, which usually disappears after stopping the drug. In addition, hermaphroditism and congenital testicular dysplasia can also lead to breast hypertrophy. Is it normal for a little boy to have breast development? Through the detailed introduction in the above article, I believe you have a certain understanding. Boys' breast development is also a necessary physiological stage, but due to individual differences, some teenagers feel more sensitive. Generally, after a few months to a year, with the development of the body and the metabolic changes of hormone levels in the body, these phenomena you mentioned will gradually disappear. |
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