" /> Vitamin D 1 Alpha-Hydroxylase Deficiency - CISMeF





Preferred Label : Vitamin D 1 Alpha-Hydroxylase Deficiency;

NCIt related terms : Pseudo Vitamin-D Deficient Rickets; Vitamin D-dependent Rickets Type 1; Vitamin D Hydroxylation-deficient Rickets type 1a; VDDR1; Selective 1-alpha, 25-hydroxyvitamin D3 deficiency; 1 Alpha-hydroxylase Deficiency;

NCIt definition : An autosomal recessive form of rickets caused by inactivating mutation(s) in the CYP27B1 gene, encoding 25-hydroxyvitamin D-1 alpha hydroxylase, the renal enzyme that converts 25-hydroxyvitamin D to 1 alpha,25-dihydroxyvitamin D (calcitriol), the active metabolite of vitamin D (cholecalciferol). The condition is characterized by reduced serum concentrations of 1 alpha,25-hydroxyvitamin D, normal concentrations of 25-hydroxyvitamin D, increased serum alkaline phosphatase, hypocalcemia due to reduced intestinal calcium absorption, hypophosphatemia due to renal phosphate wasting, secondary hyperparathyroidism, rickets, seizures, muscle weakness and failure to thrive.;

Alternative definition : NICHD: An autosomal recessive form of rickets caused by inactivating mutation(s) in the CYP27B1 gene, encoding 25-hydroxyvitamin D-1 alpha hydroxylase, the renal enzyme that converts 25-hydroxyvitamin D to 1 alpha,25-dihydroxyvitamin D (calcitriol), the active metabolite of vitamin D (cholecalciferol). The condition is characterized by reduced serum concentrations of 1 alpha,25-hydroxyvitamin D, normal concentrations of 25-hydroxyvitamin D, increased serum alkaline phosphatase, hypocalcemia due to reduced intestinal calcium absorption, hypophosphatemia due to renal phosphate wasting, secondary hyperparathyroidism, rickets, seizures, muscle weakness, and failure to thrive.;

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29/05/2025


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