12 cases(44%) aberrations were detected by two sequence specific probes for D13S272(13q14.3),ATM(11q23),9 with del(13q14.3),7 with del(11q23).

• 两种位点特异性探针检出12例(44%25)异常；del(13q14.；3)9例；del(11q23)7例。