Your Query returns 7 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Lhx8NM_01071310090L3    Lhx7   
Lhx8AB0504769606
LHX8AH0133739606
LHX8AY4495219606
LHX8AY4495229606
LHX8AY4495239606
Lhx8NT_08025110090

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

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Text2Knowledge ... Yong Huang 2002