Biomaterial Database

Stage I vitamin D-deficiency rickets mimicking pseudohypoparathyroidism type II. 2002

Tarak Srivastava, and Uri S Alon

Section of Nephrology and Bone and Mineral Disorders Clinic, The Children's Mercy Hospital, University of Missouri at Kansas City 64108, USA.

The clinical presentation and biochemical features of stage I vitamin D-deficiency rickets (VDR) and pseudohypoparathyroidism (PHP) type II are quite similar. These 2 entities have therefore often been mistaken for one another. We report our experience with 2 cases of stage I VDR that were originally diagnosed as PHP type II. The report provides an insight into the pathophysiology of VDR and PHP and thus allows for better differentiation between the 2 disease entities. It has become essential for pediatricians to recognize VDR owing to its resurgence in developed countries.

UI	MeSH Term	Description	Entries
D007223	Infant	A child between 1 and 23 months of age.	Infants
D008297	Male		Males
D010281	Parathyroid Hormone	A polypeptide hormone (84 amino acid residues) secreted by the PARATHYROID GLANDS which performs the essential role of maintaining intracellular CALCIUM levels in the body. Parathyroid hormone increases intracellular calcium by promoting the release of CALCIUM from BONE, increases the intestinal absorption of calcium, increases the renal tubular reabsorption of calcium, and increases the renal excretion of phosphates.	Natpara,PTH (1-84),PTH(1-34),Parathormone,Parathyrin,Parathyroid Hormone (1-34),Parathyroid Hormone (1-84),Parathyroid Hormone Peptide (1-34),Hormone, Parathyroid
D011547	Pseudohypoparathyroidism	A hereditary syndrome clinically similar to HYPOPARATHYROIDISM. It is characterized by HYPOCALCEMIA; HYPERPHOSPHATEMIA; and associated skeletal development impairment and caused by failure of response to PARATHYROID HORMONE rather than deficiencies. A severe form with resistance to multiple hormones is referred to as Type 1a and is associated with maternal mutant allele of the ALPHA CHAIN OF STIMULATORY G PROTEIN.	Albright Hereditary Osteodystrophy,PHPIa,Albright Hereditary Osteodystrophy with Multiple Hormone Resistance,PHD Ib,PHD1b,PHP Ia,Pseudohypoparathyroidism Type 1B,Pseudohypoparathyroidism, Type Ia,Pseudohypoparathyroidism, Type Ib,Hereditary Osteodystrophy, Albright,Osteodystrophy, Albright Hereditary,Pseudohypoparathyroidism Type 1Bs,Pseudohypoparathyroidisms,Pseudohypoparathyroidisms, Type Ia,Pseudohypoparathyroidisms, Type Ib,Type Ia Pseudohypoparathyroidism,Type Ia Pseudohypoparathyroidisms,Type Ib Pseudohypoparathyroidism,Type Ib Pseudohypoparathyroidisms
D003937	Diagnosis, Differential	Determination of which one of two or more diseases or conditions a patient is suffering from by systematically comparing and contrasting results of diagnostic measures.	Diagnoses, Differential,Differential Diagnoses,Differential Diagnosis
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D012279	Rickets	Disorders caused by interruption of BONE MINERALIZATION manifesting as OSTEOMALACIA in adults and characteristic deformities in infancy and childhood due to disturbances in normal BONE FORMATION. The mineralization process may be interrupted by disruption of VITAMIN D; PHOSPHORUS; or CALCIUM homeostasis, resulting from dietary deficiencies, or acquired, or inherited metabolic, or hormonal disturbances.	Rachitis,Rachitides