What are the usual tumors of adrenal incidentalomas? They usually include adrenocortical adenomas (high-functioning or non-functioning), adrenal adenomas, pheochromocytomas, ganglion cell tumors, cysts, malignant tumors, or metastatic tumors. Principles of treatment for adrenal incidentalomas Treatment varies for different diseases. For adrenal masses larger than 5-15 cm in diameter, they should be surgically removed because of the possibility of cortical cancer. For substantial homogeneous adrenal tumors less than 3 cm in diameter, surgical resection is also required if hormone measurements demonstrate high function. For non-functional tumors less than 3 cm in diameter cortical carcinoma is unlikely, but it should be followed up regularly and CT should be repeated once in 3 months. If the tumor material increases after 3 months, it is not cortical carcinoma, and if the mass increases, hormone measurement should be repeated and surgical resection should be performed subsequently. If adrenal cyst is suspected, cyst puncture should be performed, and if the puncture fluid is clear, benign is determined. If the puncture fluid is bloody, further sex hormone measurement should be performed, and if the hormone measurement is negative and the diameter of the cyst is less than 3 cm, surgery is not necessary and follow-up can be performed. After the diagnosis of adrenal metastasis is confirmed, the tumor should be treated actively, and the hormone level should be measured and supplemented with glucocorticoids and salt corticoids in time.