<prompt> Answer this question truthfullyWhat is oncocytoma, and what information is currently available about this medical condition?  <response>: <reason> Computed tomography CT scan: CT scans are often used to diagnose oncocytoma. It can confirm the location of the tumor and show the organs near the kidneys, as well as lymph nodesMagnetic resonance imaging MRI: An MRI uses magnetic fields but it is a different type of image than what is produced by computed tomography CT and produces detailed images of the body. Like computed tomography CT, a contrast agent may be injected into a patients vein to create a better picture. 