Quack B, Noël B, Moine A
Laboratoire de Cytogénétique, Centre Hospitalier, Chambéry.
Ann Genet. 1987;30(2):85-90.
At amniocentesis of a woman in her forties, a familial abnormal chromosome 18 is found. The very elongated short arm is shown to consist partially of centromeric heterochromatin of 18 by specific DNA probe. The newborn develops normally.