Chromosomal Mosaicism

Chromosomal mosaicism is a condition in which a person has two or more groups of cells with a different chromosomal makeup, arising from the same individual during their development.

How it originates: It arises from changes that occur during cell division in early stages, so that some cells keep one chromosomal set and others a different one.

How it may show up: Its effects are highly variable; in some cases it goes unnoticed and in others it is associated with physical or developmental traits that depend on the type and proportion of cells involved.

Which specialist addresses it? The medical geneticist is the one who interprets this kind of finding and guides families. When there is a question about development or a result that raises questions, it's a good idea to discuss it with a professional trained in genetics.