Adrenal tumors occurring in the adrenal glands can be divided into 4 major categories: Adrenal cortical tumogrs, Adrenal medullary tumours, Other adrenal tumours and Secondary tumours. ). Adrenal cortical tumors are divided into two types: Adrenal cortical carcinoma and Adrenal cortical adenoma. Adrenal medullary tumors are classified into Malignant phaeochromocytoma, Benign phaeochromocytoma and Composite phaeochromocytoma/paraganglioma. paraganglioma). Other adrenal tumors are classified as Adenomatoid tumour, Sex-cord stromal tumour, and Soft tissue and germ cell tumours. The latter is divided into Myelolipoma, Teratoma, Schwannoma, Ganglioneuroma, etc. Adrenocortical adenomas have an autopsy detection rate of 3-8.7% and are classified as functional or non-functional depending on whether they secrete hormones or not. The latter is the most common mass lesion of the adrenal gland and may not require treatment if diagnosed preoperatively and is small in size. I have collected more than 700 cases of adrenal tumors or tumorigenic lesions confirmed by surgical pathology. Because it is difficult to distinguish adrenal cortical adenoma from adenoma (nodule)-like hyperplasia and pheochromocytoma from medullary hyperplasia in clinical symptoms, laboratory and imaging examinations, they were counted together. There were 336 male and 364 female cases. 7-78 years old, mean 48.1 years old. The median was 50 years old. Among them, there were 394 cases of cortical adenoma and adenoma (nodular) like hyperplasia (including 330 cases of adenoma and 64 cases of hyperplasia), 16 cases of cortical carcinoma, 144 cases of pheochromocytoma and medullary hyperplasia (including 133 cases of pheochromocytoma and 11 cases of medullary hyperplasia), 6 cases of malignant pheochromocytoma, 5 cases of dermatomedullary hyperplasia, 1 case of adenoid adenoma, 45 cases of medullary lipoma, 4 cases of teratoma, 25 cases of ganglion cell tumor, 25 cases of ganglioblastoma 1 case, nerve sheath tumor 6 cases, malignant nerve sheath tumor 3 cases, neurofibroma 1 case, neuroblastoma 2 cases, sarcoma 4 cases, lipoma 5 cases, vascular smooth muscle lipoma 1 case, hemangioma 3 cases, lymphadenoma 2 cases, vascular tumor 2 cases, lymphoma 8 cases, metastatic tumor 22 cases. According to the above data, there are 7 common and more common tumors in the adrenal gland, including 4 benign tumors: cortical adenoma and adenoma (nodular) like hyperplasia, pheochromocytoma and medullary hyperplasia, medullary lipoma, ganglioneuroblastoma, and 3 malignant tumors: cortical carcinoma, lymphoma, and metastasis. The above seven types of renal tumors mostly show the following performance on CT and MRI: cortical adenoma and cortical hyperplasia have low density on CT flat scan, significantly lower signal on MRI inversion sequence, mild to moderate enhancement on enhanced scan, and faster contrast withdrawal in delayed phase; pheochromocytoma and medullary hyperplasia are more homogeneous when the lesions are small, and are prone to hemorrhage, necrosis, and cystic changes when they are larger, with significant enhancement on enhanced scan, and nearly half of the lesions can be seen in liquid-fluid flat or Myeloid lipoma is rich in fatty components, with mild to moderate enhancement of the medullary component on enhancement scan; ganglioneuroblastoma is more homogeneous, less dense on CT scan, with mild enhancement on enhancement scan and a tendency to creeping growth; cortical carcinoma is heterogeneous, infiltrative growth, with more obvious enhancement on enhancement scan; lymphoma is more homogeneous, often bilateral, and diffusely infiltrative, with adrenal gland morphology still maintained, with mild enhancement on enhancement scan; metastasis is heterogeneous, often bilateral, and diffusely infiltrative. Metastases are heterogeneous, often bilateral, multifocal, and show moderate circumferential enhancement on enhancement scans. Common and more common adrenal tumors have their characteristic manifestations on CT and MRI, and the diagnosis can be made preoperatively based on the homogeneity of texture, blood supply, morphology and number of lesions, and the invasion status of surrounding tissues.