Objective: Most genetic disorders, especially rare and manifested with an unspecific constellation of developmental anomalies, are challenging to diagnose before birth. The paper aims to present a rare case of terminal 21q22 deletion to extend the knowledge on this rare genetic disease, mostly to facilitate prenatal guidance by pointing the diagnostic features.
Case Report: The fetus was diagnosed prenatally, at 21 weeks of gestation, due to ultrasound markers detected in a routine ultrasound scan. Post-mortem dysmorphological assessment has verified the diagnosis. To the best of our knowledge, this is the second report of prenatal presentation of partial monosomy 21q.
Conclusion: By giving the detailed phenotype description and presenting a comprehensive literature review on the subject, we delineate its phenotype, which was different from what has been shown in the literature. Specifically, the clinical presentation of aberration within regions 2 and 3 (referring to the term proposed by Lyle et al., in 2009) of 21q22 bands is not characterised by multiple or severe malformations, which matters for prenatal counselling and diagnostics.
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| http://dx.doi.org/10.1016/j.tjog.2021.09.029 | DOI Listing |
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