Your Query returns 12 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
hoxc9NM_1315287955bz39    BZ-39    hoxc9a   
hoxc9Y145407955
Hoxc9NM_00827210090Hox-3.2    142971
HOXC9BC0538949606HOX3    HOX3B    142971
HOXC9X996829606142971
HOXC9X996839606142971
HOXC9NM_0068979606HOX3    HOX3B    142971
Hoxc9AF06095010090142971
Hoxc9NT_03962110090142971
Hoxc9BC05083810090142971
Hoxc9AF0609519031
HOXC9NT_0294199606142971

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

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Text2Knowledge ... Yong Huang 2002