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. 2024 Oct 15;58(18):56-63.
doi: 10.47895/amp.vi0.8179. eCollection 2024.

Galactosemia among Positive-screened Patients who Underwent Lactose Challenge: A Review of Records of the Newborn Screening Program

Mary Erika V Orteza  1 , Mary Ann R Abacan  1
Affiliations

Galactosemia among Positive-screened Patients who Underwent Lactose Challenge: A Review of Records of the Newborn Screening Program

Mary Erika V Orteza et al. Acta Med Philipp. .

Abstract

Background: Newborns screened positive for Galactosemia through Expanded Newborn Screening (ENBS) with borderline levels undergo lactose challenge that requires interruption of breastfeeding temporarily then shifting to soy-based formula.

Objective: To determine the percentage of Classical Galactosemia (CGal), Non-classical Galactosemia (NCGal), probable mild variant form, and negative Galactosemia among newborns screened positive for Galactosemia who underwent lactose challenge.

Methods: This is a retrospective study. NBS records were reviewed and data were collected from January 2015 to December 2020.

Results: Out of the 117 newborns screened positive for Galactosemia, 58 underwent lactose challenge. Majority were male, term with a birth weight of 2500-4000g and received a final disposition in 4-6 months. Fifteen patients underwent 1-week lactose challenge wherein six reached a resolution on first challenge. Majority, 35 (60.3%) were negative for Galactosemia, six (10.3%) probable mild variant Galactosemia, three (5.2%) NCGal, and no CGal were observed. Fourteen suspected cases (24.1%) are pending final disposition.

Conclusion: This study describes the demographics of newborns flagged for Galactosemia who underwent lactose challenge. A 1-week lactose challenge may be recommended to further detect patients who are negative for Galactosemia.

Keywords: ENBS; galactosemia; lactose challenge.

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Conflict of interest statement

Both authors declared no conflicts of interest.

Figures

Figure 1
Figure 1
Major reactions of galactose metabolism. The three enzymes of the Leloir Pathway (GALK, GALT, and GALE) are presented in red font.
Figure 2
Figure 2
Process of screened positive newborns for Galactosemia.
See this image and copyright information in PMC

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