Constellation of congenital abnormalities in an infant: A new syndrome or tissue-specific mosaicism for trisomy 18?
✍ Scribed by Shashi, Vandana; Golden, Wendy L.; von Kap-Herr, Christopher; Wilson, William G.
- Publisher
- John Wiley and Sons
- Year
- 1996
- Tongue
- English
- Weight
- 23 KB
- Volume
- 62
- Category
- Article
- ISSN
- 0148-7299
No coin nor oath required. For personal study only.
✦ Synopsis
A newborn infant born to consanguineous (first cousin) parents was noted to have complex congenital heart defect and minor anomalies suggestive of trisomy 18. Blood lymphocyte and skin fibroblast karyotypes were normal. He died in the neonatal period of postoperative complications. On interphase fluorescence in-situ hybridization (FISH) using autopsy specimens, a significant number of cells in the liver (17%) were trisomic for chromosome 18, compared to normal control liver tissue. However, interphase FISH analyses of blood lymphocytes, skin fi- broblasts, and kidney tissue were normal. It is our opinion that this apparent mosaicism for trisomy 18 in the patient's liver may be spurious, though it brings into focus the issue of possible tissue/organ-specific mosaicism. The anomalies in this infant do not resemble a previously described malformation syn- drome. Parental consanguinity raises the possibility that this represents a new autosomal recessive malformation syndrome.