Your Query returns 7 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
MTC1BC0030729606HSCR1    MEN2A    MEN2B    PTC    CDHF12    RET51    RET   
MTC1BC0042579606HSCR1    MEN2A    MEN2B    PTC    CDHF12    RET51    RET   
MTC1NM_0003239606PTC    HSCR1    MEN2A    MEN2B    RET51    CDHF12    RET   
MTC1NM_0209759606PTC    HSCR1    MEN2A    MEN2B    RET51    CDHF12    RET   
MTC1NM_0206299606PTC    HSCR1    MEN2A    MEN2B    RET51    CDHF12    RET   
MTC1NM_0206309606PTC    HSCR1    MEN2A    MEN2B    RET51    CDHF12    RET   
mtc1AJ5159029796

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

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Text2Knowledge ... Yong Huang 2002