With the more specified area, fine-tuning imaging with a 4DCT can identify the specific location of the ectopic parathyroid tissue.<h4>Conclusion</h4>A sequence of SVS PTH followed by 4DCT could identify the exact location of ectopic parathyroid adenomas in a patient when conventional non-invasive imaging studies failed. The gene discussed is PTH; the disease is parathyroid gland adenoma.