The adrenal glands, as the name implies, are the glands that stay above the kidneys and are the organs responsible for secreting hormones in the body, one above each of the left and right kidneys. Although small, the adrenal glands can secrete dozens of hormones, which can be summarized into several categories: adrenocortical hormones, including salt corticosteroids, glucocorticoids and sex hormones; the core of the adrenal glands, the medulla, also secretes medullary hormones, including epinephrine, norepinephrine and dopamine. When it comes to hormones, the first thing that comes to mind is the “hormone therapy” that makes people fat. In fact, each of the many hormones secreted by the adrenal glands plays a very important role in regulating the body’s fat, blood sugar, salt metabolism, metabolism and crisis response. Therefore, the adrenal glands are an indispensable organ of the human body. Many people unexpectedly find tumors in the adrenal glands when they have abdominal CT or MRI examinations, but their bodies do not feel uncomfortable. This is because most adrenal tumors are benign, non-functional and not cancerous. Most of the adrenal tumors do not affect the hormone secretion function of the adrenal glands and are not harmful to the body and do not require treatment. However, there are some adrenal tumors that will affect hormone secretion, and patients will have symptoms such as rapid increase in blood pressure, frequent decrease in blood potassium, full moon face, buffalo back, abnormal blood sugar or abnormal menstruation, abnormal sexual characteristics, etc. Then they need timely treatment. Of course, there are very few adrenal tumors are malignant, but malignant adrenal cancer can be clearly diagnosed through CT and MRI, so patients do not need to worry too much about misdiagnosis or sudden malignant transformation of benign tumors.