Your Query returns 5 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Hspg1NM_00830410090Synd2    syndecan-2    Sdc2    142460
HSPG1BC0498369606HSPG    SYND2    SDC2    142460
HSPG1BC0301339606HSPG    SYND2    SDC2    142460
HSPG1NM_0029989606HSPG    SYND2    SDC2    142460
HSPG1J046219606142460

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

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Text2Knowledge ... Yong Huang 2002