Your Query returns 4 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
smMHCNM_01360710090Myh11   
SMMHCNM_0024749606SMHC    MYH11   
SMMHCNM_0228449606SMHC    MYH11   
smMHCBC02614210090Myh11   

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

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Text2Knowledge ... Yong Huang 2002