Prenatal Diagnosis of a Low-Level Mosaic Small Supernumerary Marker Chromosome (sSMC): Early Postnatal Clinical Follow-Up
Small supernumerary marker chromosomes (sSMCs) are rare chromosomal abnormalities with diverse outcomes and variable effects that can be detected prenatally. The clinical significance of low-level mosaic sSMCs is often uncertain, and postnatal follow-up is essential to assess phenotypic outcomes. A fetus in whom a low-...