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15.06.2018 | Original Article

High incidence of maternal vitamin B₁₂ deficiency detected by newborn screening: first results from a study for the evaluation of 26 additional target disorders for the German newborn screening panel

verfasst von: Gwendolyn Gramer, Junmin Fang-Hoffmann, Patrik Feyh, Glynis Klinke, Peter Monostori, Jürgen G. Okun, Georg F. Hoffmann

Erschienen in: World Journal of Pediatrics | Ausgabe 5/2018

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Abstract

Background

Newborn screening (NBS) in Germany currently includes 15 target disorders. Recent diagnostic improvements suggest an extension of the screening panel.

Methods

Since August 2016, a prospective study evaluating 26 additional target disorders (25 metabolic disorders and vitamin B₁₂-deficiency) in addition to the German screening panel is performed at the Newborn Screening Center Heidelberg. First-tier results from tandem-MS screening are complemented by second-tier strategies for 15 of the additional target disorders. NBS results of seven patients diagnosed symptomatically with one of the additional target disorders by selective screening since August 2016 are retrospectively evaluated.

Results

Over a 13-month period, 68,418 children participated in the study. Second-tier analyses were performed in 5.4% of samples. Only 59 (0.1%) of study participants had abnormal screening results for one of the additional target disorders. Target disorders from the study panel were confirmed in 12 children: 1 3-hydroxy-3-methylglutaryl coenzyme A (CoA)-lyase deficiency, 1 citrullinemia type I, 1 multiple acyl-CoA dehydrogenase-deficiency, 1 methylenetetrahydrofolate reductase-deficiency, and 8 children with maternal vitamin B₁₂-deficiency. In addition, six of seven patients diagnosed symptomatically outside the study with one of the target disorders would have been identified by the study strategy in their NBS sample.

Conclusions

Within 13 months, the study “Newborn Screening 2020” identified additional 12 children with treatable conditions while only marginally increasing the recall rate by 0.1%. Maternal vitamin B₁₂-deficiency was the most frequent finding. Even more children could benefit from screening for the additional target disorders by extending the NBS panel for Germany and/or other countries.

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Titel: High incidence of maternal vitamin B12 deficiency detected by newborn screening: first results from a study for the evaluation of 26 additional target disorders for the German newborn screening panel
verfasst von: Gwendolyn Gramer
Junmin Fang-Hoffmann
Patrik Feyh
Glynis Klinke
Peter Monostori
Jürgen G. Okun
Georg F. Hoffmann
Publikationsdatum: 15.06.2018
Verlag: Childrens Hospital, Zhejiang University School of Medicine
Erschienen in: World Journal of Pediatrics / Ausgabe 5/2018
Print ISSN: 1708-8569
Elektronische ISSN: 1867-0687
DOI: https://doi.org/10.1007/s12519-018-0159-1

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High incidence of maternal vitamin B₁₂ deficiency detected by newborn screening: first results from a study for the evaluation of 26 additional target disorders for the German newborn screening panel