S. Schwartz et J. Leanacox, FLUORESCENT IN-SITU HYBRIDIZATION (FISH) - A NEW APPLICATION IN THE DELINEATION OF TRUE VS PSEUDOMOSAICISM IN PRENATAL-DIAGNOSIS, Prenatal diagnosis, 13(8), 1993, pp. 661-670
Metaphase chromosomes and interphase nuclei from nine amniotic fluid c
ultures were studied with fluorescence in situ hybridization (FISH). T
he samples were initially analyzed with routine G-banding and were dia
gnosed as having true mosaicism (five patients) or pseudomosaicism (fo
ur patients). In our study, FISH analysis could provide additional inf
ormation to distinguish pseudo- from true mosaicism by allowing interp
hase studies and analysis of an increased number of metaphase spreads.
These results suggest a multilinear origin of 'in situ' colonies of c
ells.