Your Query returns 8 Accession Numbers:
Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
C21ORF1BC0192959606C21ORF3    PBF    PTTG1IP    603784
C21ORF1BC0128589606C21ORF3    PBF    PTTG1IP    603784
C21ORF1BC0209839606C21ORF3    PBF    PTTG1IP    603784
C21ORF1BC0310979606C21ORF3    PBF    PTTG1IP    603784
C21ORF1BC0004159606C21ORF3    PBF    PTTG1IP    603784
C21ORF1BC0342509606C21ORF3    PBF    PTTG1IP    603784
C21ORF1NM_0043399606PBF    C21ORF3    PTTG1IP    603784
C21orf1AL1633009606603784

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

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Text2Knowledge ... Yong Huang 2002