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Studies of Elevated Parathyroid Activity

This study is currently recruiting participants.
Verified November 17, 2017 by National Institutes of Health Clinical Center (CC) ( National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) )
Sponsor:
ClinicalTrials.gov Identifier:
NCT00001277
First Posted: November 4, 1999
Last Update Posted: November 28, 2017
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Know the risks and potential benefits of clinical studies and talk to your health care provider before participating. Read our disclaimer for details.
Information provided by (Responsible Party):
National Institutes of Health Clinical Center (CC) ( National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) )
November 3, 1999
November 4, 1999
November 28, 2017
March 31, 1991
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Evaluate natural history of hyperparathyroidism [ Time Frame: On-going ]
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Complete list of historical versions of study NCT00001277 on ClinicalTrials.gov Archive Site
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Studies of Elevated Parathyroid Activity
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.

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.
Observational
Observational Model: Cohort
Time Perspective: Prospective
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  • Hyperparathyroidism
  • Hypocalcemia
  • Parathyroid Neoplasm
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*   Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
 
Recruiting
2000
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  • INCLUSION CRITERIA:

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.

EXCLUSION CRITERIA:

There are no absolute exclusions.

Sexes Eligible for Study: All
Child, Adult, Senior
No
Contact: William F Simonds, M.D. (301) 496-9299 wfs@helix.nih.gov
United States
 
 
NCT00001277
910085
91-DK-0085
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National Institutes of Health Clinical Center (CC) ( National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) )
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
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Principal Investigator: William F Simonds, M.D. National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
National Institutes of Health Clinical Center (CC)
November 17, 2017