* The investigators aim to recruit 100 patients with confirmed, or likely, primary aldosteronism to undergo conventional tests, CT, AVS, and 11C-metomidate PET-CT.
* Results will be reviewed and discussed at a multidisciplinary meeting, and patients with unilateral PA or adrenal tumor will be offered surgery. Patients will be reviewed 6 months post-surgery.
* In a separate study, the investigators will recruit 10 patients with adrenal tumors to differentiate adrenocortical lesions from other lesions in patients with adrenal tumors
