Your Query returns 4 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
DFF40NM_00785910090CAD    CPAN    40kDa    Didff    5730477D02Rik    Dffb   
DFF40BC0487979606CPAN    CAD    DFF2    DFF-40    DFFB   
DFF40NM_0044029606CAD    CPAN    DFF2    DFF-40    DFFB   
DFF40AF0640199606

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

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Text2Knowledge ... Yong Huang 2002