Your Query returns 2 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
pax2aNM_1311847955noi    paxb    Pax-2    cb378    pax-b    pax2.1    PAXZF-B    pax[zf-b]   
pax2aBC0666907955noi    Pax-2    cb378    pax-b    PAXZF-B    pax[zf-b]   

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

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Text2Knowledge ... Yong Huang 2002