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Table 1 Spectral Karyotype Findings in 31 Prenatal Cases and 148 Postnatal Cases with Abnormal Karyotypes

From: Spectral Karyotyping for identification of constitutional chromosomal abnormalities at a national reference laboratory

Cytogenetic (GTG-banded) Abnormality Spectral Karyotype Findings
  Positive, n Inconclusive, n Approximate Sensitivity, %
Supernumerary Marker    
   Prenatal (n = 13) 10 3 77
   Postnatal (n = 62) 48 14 77
Additonal genetic material    
   Prenatal (n = 6) 5 1 83
   Postnatal (n = 65) 63 2 97
Ring chromosome    
   Prenatal (n = 4) 4 0 100
   Postnatal (n = 9) 9 0 100
Complex rearrangements    
   Prenatal (n = 8) 7 1 88
   Postnatal (n = 12) 12 0 100
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Total    
   Prenatal (N = 31) 26 5 84
   Postnatal (N = 148) 132 16 89