Accidentally detected nephrocalcinosis in a boy with a homozygous R396W mutation in the CYP24A1 gene – 7-year follow-up

Jakub Krzysztof Nowicki; Anna Maćkowska; Małgorzata Rychwalska; Marcin Zaniew; Elżbieta Jakubowska-Pietkiewicz

doi:10.5114/polp.2023.133542

eISSN: 2300-8660
ISSN: 0031-3939

Pediatria Polska - Polish Journal of Paediatrics

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4/2023
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abstract:

Case report

Accidentally detected nephrocalcinosis in a boy with a homozygous R396W mutation in the CYP24A1 gene – 7-year follow-up

Jakub Krzysztof Nowicki

¹

,

Anna Maćkowska

¹

,

Małgorzata Rychwalska

²

,

Marcin Zaniew

³

,

Elżbieta Jakubowska-Pietkiewicz

¹

Department of Pediatrics, Neonatal Pathology and Metabolic Bone Diseases, Medical University of Lodz, Lodz, Poland
Department of Pediatrics, Diabetology, Endocrinology and Nephrology, Medical University of Lodz, Lodz, Poland
Department of Pediatrics, University of Zielona Gora, Zielona Gora, Poland

Pediatr Pol 2023; 98 (4): 357-361

DOI: https://doi.org/10.5114/polp.2023.133542

Online publish date: 2023/12/15

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AMA

Nowicki J, Maćkowska A, Rychwalska M, Zaniew M, Jakubowska-Pietkiewicz E. Accidentally detected nephrocalcinosis in a boy with a homozygous R396W mutation in the CYP24A1 gene – 7-year follow-up. Pediatria Polska - Polish Journal of Paediatrics. 2023;98(4):351-361. doi:10.5114/polp.2023.133542.

APA

Nowicki, J., Maćkowska, A., Rychwalska, M., Zaniew, M.,  & Jakubowska-Pietkiewicz, E. (2023). Accidentally detected nephrocalcinosis in a boy with a homozygous R396W mutation in the CYP24A1 gene – 7-year follow-up. Pediatria Polska - Polish Journal of Paediatrics, 98(4), 351-361. https://doi.org/10.5114/polp.2023.133542

Chicago

Nowicki, Jakub Krzysztof, Anna Maćkowska, Małgorzata Rychwalska, Marcin Zaniew,  and Elżbieta Jakubowska-Pietkiewicz. 2023. "Accidentally detected nephrocalcinosis in a boy with a homozygous R396W mutation in the CYP24A1 gene – 7-year follow-up". Pediatria Polska - Polish Journal of Paediatrics 98 (4): 351-361. doi:10.5114/polp.2023.133542.

Harvard

Nowicki, J., Maćkowska, A., Rychwalska, M., Zaniew, M.,  and Jakubowska-Pietkiewicz, E. (2023). Accidentally detected nephrocalcinosis in a boy with a homozygous R396W mutation in the CYP24A1 gene – 7-year follow-up. Pediatria Polska - Polish Journal of Paediatrics, 98(4), pp.351-361. https://doi.org/10.5114/polp.2023.133542

MLA

Nowicki, Jakub Krzysztof et al. "Accidentally detected nephrocalcinosis in a boy with a homozygous R396W mutation in the CYP24A1 gene – 7-year follow-up." Pediatria Polska - Polish Journal of Paediatrics, vol. 98, no. 4, 2023, pp. 351-361. doi:10.5114/polp.2023.133542.

Vancouver

Nowicki J, Maćkowska A, Rychwalska M, Zaniew M, Jakubowska-Pietkiewicz E. Accidentally detected nephrocalcinosis in a boy with a homozygous R396W mutation in the CYP24A1 gene – 7-year follow-up. Pediatria Polska - Polish Journal of Paediatrics. 2023;98(4):351-361. doi:10.5114/polp.2023.133542.

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Nephrocalcinosis can manifest as frequent urination, haematuria and recurrent urinary tract infections, as well as a decrease in bone mineral density, increasing the risk of osteoporosis. Excessive urinary calcium excretion may have a genetic basis, including mutations within the genes encoding vitamin D3 metabolising enzymes. This paper presents a report of a 7-year follow-up of a boy in whom abdominal ultrasound incidentally detected nephrocalcinosis. The patient was confirmed to have a homozygous R396W mutation in the CYP24A1 gene, which encodes an enzyme responsible for inactivating calcitriol and protecting the cell from vitamin D3 intoxication. Radiological examinations showed a decrease in bone mineral density in the spine. Genetic factors, especially those related to abnormal vitamin D3 metabolism, should be considered in the differential diagnosis of incidentally detected nephrocalcinosis. Children with excessive urinary calcium excretion are at particular risk of developing skeletal complications, including osteopenia and osteoporosis.

keywords:

Accidentally detected nephrocalcinosis in a boy with a homozygous R396W mutation in the CYP24A1 gene – 7-year follow-up

Jakub Krzysztof Nowicki 1 , Anna Maćkowska 1 , Małgorzata Rychwalska 2 , Marcin Zaniew 3 , Elżbieta Jakubowska-Pietkiewicz 1

paediatrics, bone density, calcium, nephrocalcinosis, vitamin D3 24-hydroxylase

Jakub Krzysztof Nowicki

¹

,

Anna Maćkowska

¹

,

Małgorzata Rychwalska

²

,

Marcin Zaniew

³

,

Elżbieta Jakubowska-Pietkiewicz

¹