Meanings of supernumerary marker in English

The finding of a supernumerary marker chromosome in amniotic fluid cells poses a considerable counseling dilemma.

Small supernumerary marker chromosomes are present in about 0.05% of the human population.

We describe the structure of a supernumerary marker in a child who presented with a right atretic ear and multiple congenital anomalies.

The possible derivation of a small supernumerary marker chromosome was investigated by means of different staining techniques and the frequency of satellite associations.

Information is presented which has been obtained from an exhaustive examination of 44 probands with a supernumerary marker chromosome (mar) and their families.

To our knowledge a total of 25 cases, confirmed by FISH, have been reported with either supernumerary marker or ring chromosome 8.