| Recruiting | Parathyroidectomy After Kidney Transplantation NCT07415421 | Aarhus University Hospital | N/A |
| Recruiting | Routine Validation and Reproducibility Testing of Laboratory Assays and Research Techniques Used for Endocrine NCT07083557 | Bettina Mittendorfer | — |
| Recruiting | Parathyroidectomy and Mobility Study NCT07103876 | University of Florida | — |
| Recruiting | Dual-Channel Near-Infrared Autofluorescence Imaging and AI Analysis to Locate Parathyroid Glands (PTFinder) NCT07010380 | Bo Wang,MD | — |
| Enrolling By Invitation | PET-TC in Thyroid Evaluation NCT06852144 | IRCCS Azienda Ospedaliero-Universitaria di Bologna | — |
| Active Not Recruiting | Abnormally High Parathyroid Hormone Levels Worsens Outcomes in Vitamin D Depleted Critical Care Patients NCT06711874 | National Taiwan University Hospital | — |
| Active Not Recruiting | STP.168 Clinical Study Protocol Parakeet NCT06499142 | Neurovision Medical Products Inc | N/A |
| Recruiting | NUclear MEdicine DIagnostic and Artificial Intelligence NCT05963841 | Centre Hospitalier Universitaire de Besancon | — |
| Recruiting | Effects of Multiple Mega-dose of Vitamin D3 Supplementation on Ameliorating Moderate to Severe Chronic Pain in NCT05667090 | Taipei Medical University Hospital | N/A |
| Terminated | F-18 PSMA for Localization of Parathyroid Adenoma NCT05299632 | Emory University | — |
| Completed | Near Infrared Autofluorescence (NIRAF) Detection for Identifying Parathyroid Glands During Parathyroidectomy NCT05152927 | University of California, San Francisco | N/A |
| Recruiting | Establishment of a Registry of Patients With Parathyroid Disease NCT06797934 | IRCCS Azienda Ospedaliero-Universitaria di Bologna | — |
| Completed | Antiresorptive Effect of Treatment With Risedronate and Vitamin D in Postmenopausal Patients NCT05346419 | Hospital Regional 1o de Octubre | N/A |
| Completed | Effect of Vitamin D Supplement on Disease Activity in SLE NCT05260255 | Department of Medical Services Ministry of Public Health of Thailand | N/A |
| Completed | Determination of Circulating Autotaxin in Patients With GNAS or PTH Abnormalities NCT04671719 | Hospices Civils de Lyon | — |
| Completed | Trial Comparing 2 Diagnostic Strategies for Preoperative Localization of Parathyroid Adenoma in Primary Hyperp NCT04040946 | Centre Francois Baclesse | Phase 3 |
| Unknown | Epidemiology of Pituitary Tumours: Prevalence of Associated Neoplasia NCT03973450 | Neuromed IRCCS | — |
| Completed | Swalqol in Primary Hyperparathyroidism NCT03968510 | Uşak University | — |
| Unknown | Bilateral Superficial Cervical Plexus Block in Thyroid/Parathyroid Surgery NCT04051099 | Mahidol University | N/A |
| Completed | 18F-fluorocholine PET/CT for Hyperparathyroidism NCT04316845 | Buddhist Tzu Chi General Hospital | N/A |
| Completed | Serum Calcium to Phosphorous (Ca/P) Ratio in the Diagnosis of Ca-P Metabolism Disorders: a Multicentre Study NCT03747029 | Azienda Ospedaliero-Universitaria di Modena | — |
| Unknown | Corticosteroid Rhythms in Hypoparathyroid Patients NCT02986607 | University of Bergen | EARLY_Phase 1 |
| Completed | The Utility of 18F-fluorocholine PET/CT in the Imaging of Parathyroid Adenomas NCT04570033 | Military Institute od Medicine National Research Institute | N/A |
| Withdrawn | Insulin Resistance in Primary Hyperparathyroidism NCT02711059 | Karolinska University Hospital | N/A |
| Completed | Optimal HCTZ Cessation for Diagnosis of Hyperparathyroidism NCT02591160 | University of Missouri-Columbia | N/A |
| Completed | Interest of the F18-choline as a Second Line of the Tracer for Detection of Parathyroid Adenomas NCT02432599 | Centre Francois Baclesse | Phase 2 |
| Withdrawn | One Week Comparison Study of PTH and PTHrP Infusions NCT01333267 | University of Pittsburgh | Phase 1 |
| Completed | Study of the Efficacy of Local Analgesia as an Adjunct to General Anesthesia in Thyroidectomy and Parathyroide NCT02205801 | University of Chicago | N/A |
| Completed | Association Between Serum Periostin Levels and Cortical Porosity in Patients With Secondary Hyperparathyroidis NCT02524041 | Centre Hospitalier Universitaire de Saint Etienne | N/A |
| Completed | Phase 1/2 Study of KHK7580 for Secondary Hyperparathyroidism in Patients Receiving Hemodialysis NCT01935856 | Kyowa Kirin Co., Ltd. | Phase 1 / Phase 2 |
| Unknown | 18F-fluorocholine PET/CT Imaging in Hyperparathyroidism NCT03203668 | University Medical Centre Ljubljana | N/A |
| Terminated | Gene Expression in Hyperparathyroidism NCT03044600 | M.D. Anderson Cancer Center | — |
| Completed | Short- and Long-Term Impact of Subtotal Parathyroidectomy on the Achievement of Bone and Mineral Parameters Re NCT01872429 | Far Eastern Memorial Hospital | — |
| Unknown | Variables That Are Correlated to Developing Multiple Endocrine Neoplasia (MEN) and Pancreatic Neuroendocrine T NCT03053999 | M.D. Anderson Cancer Center | — |
| Completed | The Renin-Angiotensin-Aldosterone System and Parathyroid Hormone Control: The RAAS-PARC Study NCT01691781 | Brigham and Women's Hospital | N/A |
| Completed | Efficacy and Safety of Ultrasonic Ablation to Treat Secondary Hyperparathyroidism in Chronic Kidney Disease Pa NCT01640184 | Dongliang Zhang, MD | N/A |
| Terminated | Pediatric Chronic Kidney Disease Safety and Efficacy NCT01277510 | Amgen | Phase 3 |
| Completed | Vitamin D Supplementation in HIV-infected Youth NCT01656070 | University of Milan | Phase 2 |
| Completed | Serum Calcium to Phosphorous Ratio (Ca/P) as a Simple, Inexpensive Screening Tool in the Diagnosis of Primary NCT03027349 | Azienda USL Modena | — |
| Unknown | The Novel Approach of Minimally Invasive Parathyroid Surgery Requires Precise Identification and Localization NCT01226810 | Rambam Health Care Campus | — |
| Unknown | Input of C11-Choline PET/CT in Localization of Parathyroid Adenoma NCT01221896 | Hadassah Medical Organization | — |
| Completed | A Prospective Cohort Study to Describe the Evolution of Persistent Hyperparathyroidism in Kidney Transplant Re NCT01163669 | The Cleveland Clinic | — |
| Completed | Cincalcet and Vascular Arterial Stiffness Among Peritoneal Dialysis Patients With Secondary Hyperparathyroidis NCT01143987 | Chinese University of Hong Kong | Phase 4 |
| Completed | Sevelamer and Secondary Hyperparathyroidism in Chronic Kidney Disease NCT01191762 | Kenneth R. Phelps, M.D. | Phase 3 |
| Completed | Treatment Adhesion in Dialysis Patients Treated With Cinacalcet NCT01573520 | Michel Burnier | Phase 4 |
| Completed | Treatment of Autonomous Hyperparathyroidism in Post Renal Transplant Recipients NCT00975000 | Amgen | Phase 3 |
| Completed | The Effect and Safety of Hemodialysis and Hemoperfusion on Severe Renal Osteopathy and Itching in Uremia Patie NCT02747979 | Sun Yat-sen University | Phase 2 / Phase 3 |
| Completed | Safety and Efficacy Study of Paricalcitol Versus Calcitriol in the Treatment of Secondary Hyperparathyroidism NCT00800358 | Penang Hospital, Malaysia | N/A |
| Completed | Quality of Life in Patients Undergoing Parathyroidectomy NCT00905866 | Mackay Memorial Hospital | — |
| Completed | One Week Parathyroid Hormone-related Protein (PTHrP) IV Dose Escalation Study NCT00580788 | University of Pittsburgh | EARLY_Phase 1 |
| Completed | VATS for Resection of Mediastinal Parathyroids NCT05696405 | Hospital General Ajusco Medio | — |
| Completed | Effects of Vitamin D Replacement in Patients With Primary Hyperparathyroidism (PHPT) NCT00538720 | M.D. Anderson Cancer Center | Phase 1 |
| Completed | Pilot Study: Hypovitaminosis D, Hyperparathyroidism and Hypomagnesemia in Patients With Congestive Heart Failu NCT00887666 | State University of New York - Downstate Medical Center | — |
| Completed | Effect of Parathyroidectomy on Sleep NCT00501215 | M.D. Anderson Cancer Center | N/A |
| Unknown | Energy Specific Far Infrared Radiation Treatment for Hyperparathyroidism NCT00573573 | GAAD Medical Research Institute Inc. | Phase 1 |
| Completed | Effectiveness of Paricalcitol in Reducing Parathyroid Hormone (PTH) Levels in X-linked Hypophosphatemic Ricket NCT00417612 | Yale University | Phase 3 |
| Completed | 7 Day Continuous Parathyroid Hormone IV Infusion NCT00377312 | University of Pittsburgh | EARLY_Phase 1 |
| Completed | ADVANCE: Study to Evaluate Cinacalcet Plus Low Dose Vitamin D on Vascular Calcification in Subjects With Chron NCT00379899 | Amgen | Phase 4 |
| Withdrawn | The Effects of Alendronate After Cure of Primary Hyperparathyroidism NCT00359385 | Columbia University | Phase 4 |
| Completed | Study of 1.25 mmol/L Calcium Dialysate on Mineral Metabolism in Haemodialysis Patients. NCT00744302 | Sun Yat-sen University | Phase 2 |
| Completed | Vascular Risk After Kidney Transplantation NCT00374595 | University of Nebraska | — |
| Completed | Post Transplant Study NCT00395902 | Amgen | — |
| Unknown | The Effect of Parathyroidectomy on Renal Function, Endothelial Function, and Blood Pressure NCT00452049 | Universitaire Ziekenhuizen KU Leuven | — |
| Completed | Interaction Between Anaesthetics and Methylene Blue NCT00513032 | University Hospital, Geneva | — |
| Completed | Oral Peptones Load in Normocalcemic and Hypercalcemic Primary Hyperparathyroidism and Healthy Subjects NCT01042626 | University of Eastern Piedmont | N/A |
| Completed | Safety and Efficacy Study of AMG 073 in Hemodialysis Subjects NCT00527267 | Amgen | Phase 3 |
| Completed | A Study of an Investigational Medication for Severe Primary Hyperparathyroidism or Parathyroid Cancer NCT00037518 | Amgen | Phase 4 |
| Active Not Recruiting | Randall's Plaque Study: Pathogenesis and Relationship to Nephrolithiasis NCT00169806 | Indiana Kidney Stone Institute | N/A |
| Completed | A Randomized Study of Surgery vs No Surgery in Patients With Mild Asymptomatic Primary Hyperparathyroidism NCT00004843 | National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) | N/A |
| Completed | Studies of Elevated Parathyroid Activity NCT00001277 | National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) | Phase 2 |
| Completed | Comparison of Two Methods of Parathyroidectomy for Primary Hyperparathyroidism NCT00006329 | National Center for Research Resources (NCRR) | Phase 2 / Phase 3 |