Studies of Elevated Parathyroid Activity
|First Submitted Date||November 3, 1999|
|First Posted Date||November 4, 1999|
|Last Update Posted Date||November 28, 2017|
|Start Date||March 31, 1991|
|Primary Completion Date||Not Provided|
|Current Primary Outcome Measures
||Evaluate natural history of hyperparathyroidism [ Time Frame: On-going ]|
|Original Primary Outcome Measures||Not Provided|
|Change History||Complete list of historical versions of study NCT00001277 on ClinicalTrials.gov Archive Site|
|Current Secondary Outcome Measures||Not Provided|
|Original Secondary Outcome Measures||Not Provided|
|Current Other Outcome Measures||Not Provided|
|Original Other Outcome Measures||Not Provided|
|Brief Title||Studies of Elevated Parathyroid Activity|
|Official Title||Studies of Hyperparathyroidism and Related Disorders|
Patients whose parathyroid activity is elevated above normal are referred to as having hyperparathyroidism. This study will help researchers better understand the causes of hyperthyroidism and to evaluate and improve methods for diagnosis and treatment.
In this study, patients diagnosed with or suspected of having hyperparathyroidism will be selected to participate. In addition, patients with related conditions such as parathyroid tumors, will also be selected.
Subjects will be asked to provide blood and urine for testing to confirm their condition. They will then be surgically treated by removal of the parathyroid gland(s) (parathyroidectomy).
Subjects with parathyroid tumors will undergo several diagnostic tests to determine the exact location of the tumor as well as the tumor's activity. The tests may include; ultrasounds, nuclear scanning, CT scans, MRI, and specialized blood testing.
Sometimes parathyroidectomy leads to hypoparathyroidism. Options for treating the patients after the surgical procedure will also be addressed. Calcium and Vitamin D supplements are typically the mainstay of post parathyroidectomy therapy. Other potential treatments include transplanting the parathyroid gland(s) to other areas of the body.
|Detailed Description||Patients with confirmed or suspected primary hyperparathyroidism or complications therefrom (such as postoperative hypoparathyroidism) will be admitted for diagnosis and treatment. The principal diagnostic components are calcium in serum and urine and parathyroid hormone in serum. Patients with moderately to highly severe primary hyperparathyroidism will be treated. Treatment will be mainly by parathyroidectomy. Other options are medications or no intervention. Patients with a hyperparathyroid syndrome may be managed for their extraparathyroid features. Preoperative testing to localize parathyroid neoplasm(s) will be used usually and with more extended methods in cases with prior neck surgery. Preoperative tumor localization tests will be selected according to clinical indications from the following: ultrasound, technetium-thallium scan, computerized tomography, magnetic resonance imaging, fine needle aspiration for parathyroid hormone assay, selective arteriogram, selective venous catheterization for parathyroid hormone assay. Options for management of postoperative hypocalcemia include calcium, vitamin D analogs, parathyroid autografts and synthetic parathyroid hormone. Research specimens may consist of blood or tumors.|
|Study Design||Observational Model: Cohort
Time Perspective: Prospective
|Target Follow-Up Duration||Not Provided|
|Sampling Method||Not Provided|
|Study Population||Not Provided|
|Study Groups/Cohorts||Not Provided|
* Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
|Completion Date||Not Provided|
|Primary Completion Date||Not Provided|
Patients (male or female any age) with known or suspected primary hyperparathyroidism or a related disorder (such as familial multiple endocrine neoplasia type 1 [MEN1]) will be evaluated.
The vast majority of patients will be greater than age 18.
In the rare occasion where special resources might be appropriate (uremic patient, young child), the availability of special resources would be confirmed prior to admission.
There are no absolute exclusions.
|Ages||Child, Adult, Senior|
|Accepts Healthy Volunteers||No|
|Listed Location Countries||United States|
|Removed Location Countries|
|Other Study ID Numbers||910085
|Has Data Monitoring Committee||Not Provided|
|U.S. FDA-regulated Product||Not Provided|
|IPD Sharing Statement||Not Provided|
|Responsible Party||National Institutes of Health Clinical Center (CC) ( National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) )|
|Study Sponsor||National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)|
|PRS Account||National Institutes of Health Clinical Center (CC)|
|Verification Date||November 17, 2017|