Bethesda, Maryland 20892

  • Pseudopseudohpoparathyroidism

Purpose:

Patients with confirmed or suspected states with resistance to vitamin D or parathyroid hormone (PTH) will be admitted for diagnosis, treatment review with suggestions for modifications to the current or new treatment and for inclusion in other protocols. These states include hypocalcemia, rickets, osteomalacia, pseudohypoparathyroidism. Resistance to a factor is manifested by deficient bioeffect despite high levels of the factor in blood. Patients will be tested with multiple indices of mineral metabolism to establish the diagnosis and examine the spectrum of the underlying disorder. The principal therapies will be combinations of calcium, phosphate, and a vitamin D analog. Selected patients will have localization and surgery to remove a tumor that causes renal wasting of phosphate. Patients will also be considered for entry into other research protocols.


Study summary:

Patients with confirmed or suspected states with resistance to vitamin D or parathyroid hormone (PTH) will be admitted for diagnosis, treatment review with suggestions for modifications to the current or new treatment and for inclusion in other protocols. These states include hypocalcemia, rickets, osteomalacia, pseudohypoparathyroidism. Resistance to a factor is manifested by deficient bioeffect despite high levels of the factor in blood. Patients will be tested with multiple indices of mineral metabolism to establish the diagnosis and examine the spectrum of the underlying disorder. The principal therapies will be combinations of calcium, phosphate, and a vitamin D analog. Selected patients will have localization and surgery to remove a tumor that causes renal wasting of phosphate. Patients will also be considered for entry into other research protocols.


Criteria:

- INCLUSION CRITERIA: Patients, from 2 months to 100 years of age, of either sex M or F, with vitamin D resistance, rickets, osteomalacia, pseudohypoparathyroidism, pseudo-pseudohypoparathyroidism, or suspicion of these or related disorders based upon the appropriateness of their problem to ongoing investigations. Current investigations are focused principally upon the inclusion of subjects with, or suspected of having, hypocalcemia likely due to a resistance to parathyroid hormone, including subjects who have a diagnosis, or likely diagnosis, of pseudohypoparathyroidism or pseudopseudohypoparathyroidism.


NCT ID:

NCT00001242


Primary Contact:

Principal Investigator
Lee S Weinstein, M.D.
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)

Craig S Cochran, R.N.
Phone: (301) 402-1880
Email: craigc@bdg10.niddk.nih.gov


Backup Contact:

Email: leew@mail.nih.gov
Lee S Weinstein, M.D.
Phone: (301) 402-2923


Location Contact:

Bethesda, Maryland 20892
United States



There is no listed contact information for this specific location.

Site Status: Recruiting


Data Source: ClinicalTrials.gov

Date Processed: December 07, 2022

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