The concordance rate of non-chromosomal congenital malformations in twins based on zygosity: a retrospective cohort study.
BJOG
; 128(5): 857-864, 2021 04.
Article
en En
| MEDLINE
| ID: mdl-32783284
ABSTRACT
OBJECTIVE:
To examine the concordance rate of non-chromosomal congenital malformations in twin pairs based on zygosity.DESIGN:
Retrospective cohort study.SETTING:
A tertiary hospital in Korea. POPULATION Twin pairs born at Seoul National University Hospital between 2001 and 2019.METHODS:
Congenital malformations were diagnosed by postnatal workups of neonates or autopsy in cases of stillborn infants. Zygosity was confirmed by sex, chorionicity and DNA analysis. MAIN OUTCOMEMEASURES:
Concordance rate of congenital malformations in twin pairs based on zygosity.RESULTS:
In total, 3386 twin pairs were included. The risk of a congenital malformation in the index twin increased significantly if the co-twin had the congenital malformation, and the concordance rate was higher in monozygotic (MZ) than in dizygotic (DZ) twins (37.04 versus 16.77, P < 0.001). An increased risk of a congenital malformation in the presence of the same congenital malformation in the co-twin was observed only for malformations of the nervous system, eye/ear/face/neck, circulatory system, cleft lip/palate, genital organs, urinary system and musculoskeletal system. Significantly higher concordance rates in MZ than in DZ twin pairs were observed only for the nervous system (40.00 versus 0.00, P < 0.001), circulatory system (32.97 versus 19.74, P = 0.021), cleft lip/palate (44.44 versus 0.00, P = 0.017) and urinary system (22.22 versus 0.00, P = 0.004), whereas significant differences were not found for the genital organs or musculoskeletal system.CONCLUSIONS:
Monozygotic twins had higher concordance rates than DZ twins only in specific organ systems. It may be speculated that nervous system, circulatory system, cleft lip/palate and urinary system are primarily genetically affected. TWEETABLE ABSTRACT Monozygotic twins had higher concordance rates than dizygotic twins only in specific organ systems.Palabras clave
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Bases de datos:
MEDLINE
Asunto principal:
Anomalías Congénitas
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Gemelos Dicigóticos
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Gemelos Monocigóticos
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Enfermedades en Gemelos
Tipo de estudio:
Diagnostic_studies
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Etiology_studies
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Observational_studies
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Prognostic_studies
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Risk_factors_studies
Límite:
Female
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Humans
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Male
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Newborn
Idioma:
En
Revista:
BJOG
Asunto de la revista:
GINECOLOGIA
/
OBSTETRICIA
Año:
2021
Tipo del documento:
Article