Persistent Primary Hyperparathyroidism: Successful Ultrasound-Guided Percutaneous Ethanol Ablation of an Occult Adenoma  J. WILLIAM CHARBONEAU, M.D.  Mayo Clinic Proceedings  Volume 63, Issue 9, Pages 913-917 (September 1988) DOI: 10.1016/S0025-6196(12)62695-0 Copyright © 1988 Mayo Foundation for Medical Education and Research Terms and Conditions

Fig. 1 A, High-resolution ultrasound image of lower pole of right thyroid lobe, demonstrating heterogeneous parenchyma containing a 0.8-cm round hypoechoic nodule (black arrows). Within this nodule is a bright echogenic focus representing tip of needle (white arrow). B, Hypoechoic nodule shown in A became hyperechoic at moment of injection of alcohol (ETOH) (black arrows). Mayo Clinic Proceedings 1988 63, 913-917DOI: (10.1016/S0025-6196(12)62695-0) Copyright © 1988 Mayo Foundation for Medical Education and Research Terms and Conditions

Fig. 2 Serial changes in serum calcium level in patient who underwent percutaneous ethanol ablation of occult adenoma. Shaded area = range of normal values. Mayo Clinic Proceedings 1988 63, 913-917DOI: (10.1016/S0025-6196(12)62695-0) Copyright © 1988 Mayo Foundation for Medical Education and Research Terms and Conditions

Fig. 3 Serial changes in serum level of parathyroid hormone (PTH), as measured by radioimmunoassay (RIA), in patient who underwent percutaneous ethanol ablation of occult adenoma. Shaded area = range of normal values. Mayo Clinic Proceedings 1988 63, 913-917DOI: (10.1016/S0025-6196(12)62695-0) Copyright © 1988 Mayo Foundation for Medical Education and Research Terms and Conditions

Fig. 4 Serial changes in serum level of parathyroid hormone (PTH), as measured by immunoradiometric assay (IRMA), in patient who underwent percutaneous ethanol ablation of occult adenoma. Shaded area = range of normal values. Mayo Clinic Proceedings 1988 63, 913-917DOI: (10.1016/S0025-6196(12)62695-0) Copyright © 1988 Mayo Foundation for Medical Education and Research Terms and Conditions