How is an adrenal tumor diagnosed?

Imaging studies: Imaging studies (ct scan, mri, u/s) are used to diagnosed an adrenal tumor...Then you need lab tests to know if the tumor is producing hormones...

Several methods: Imaging and serum hormone levels (stimulation tests included) must be combined with a tissue sampling to get a definitive diagnosis. Imaging is very good for particular tumors, but there is enough overlap radiographically, that a core needle or similar biopsy is required to get a definitive diagnosis -- especially if you are going to be followed (not operated on).

Blood test and CT: Blood tests to check for hormone excess production. A cat scan to look for adrenal enlargement.