Cytogenetic Marker

No. of Patients (%)

Incidence in Reported Literature

del(13q)/-13

288(43)

40% - 60%

Trisomy 12

127(19%)

20% - 40%

del(11q22)

87(13%)

10% - 25%

del(17p13)/-17

101(15%)

4% - 15%

del(6q23)

51(8%)

5% - 9%