Your Query returns 7 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Rad53NM_01668110090CHK2    Cds1    HUCDS1    Chek2    604373
RAD53BC0042079606CHK2    CDS1    HuCds1    PP1425    bA444G7    CHEK2    604373
RAD53NM_0071949606CDS1    CHK2    HuCds1    PP1425    bA444G7    CHEK2    604373
RAD53NM_1458629606CDS1    CHK2    HuCds1    PP1425    bA444G7    CHEK2    604373
Rad53NW_04737810116
Rad53NM_05367710116Chk2   
RAD530N/ASPK1    MEC2    LSD1   

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* OMIM link based on symbol match for human and mouse.

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Text2Knowledge ... Yong Huang 2002