The need for surgery for adrenal adenoma 2cm depends on the benign or malignant status of the adenoma and whether it is a functional adenoma. 1. It is necessary to evaluate its benign or malignant nature. Most of the adenomas are benign, but if the imaging suggests malignant possibility or the tumor grows too fast without excluding malignant possibility, surgery should usually be considered. 2. If it is a functional adenoma, which has endocrine function, then surgery is needed regardless of the size of the adenoma. If the size of adrenal gland adenoma is 2cm, and at the same time belongs to non-functional adenoma, there is no malignant sign in imaging examination, no clinical abnormality, and the growth of the tumor is not much change, surgery can be temporarily avoided, and the tumor can be followed up for review on a regular basis, usually once every 2~3 months. If there is adrenal adenoma, it is recommended to consult the doctor in time, make a clear diagnosis and carry out standardized treatment under the doctor’s guidance, so as to avoid delaying the condition.