<prompt> Answer this question truthfullyWhat is an adrenal incidentaloma, and what size of an adrenal incidentaloma is considered to be at high risk of carcinoma and require surgical removal?  <response>: <reason> An adrenal incidentaloma is a tumor of the adrenal gland that is discovered incidentally during imaging for another reason. An adrenal incidentaloma larger than 4 cm is considered to be at high risk of carcinoma and typically requires surgical removal. 