Recent studies have shown that a long non-coding RNA-LINC00324 could competitively inhibit the function of miRNA-214-5 to inhibit the expression of cyclin-dependent protein kinase 6 (ICDK6), cyclin D1 (CCND1), murine double minute 2 (MDM2) and murine double minute 4 (MDM4), thus promoting the proliferation of immature ovarian teratoma cells and inhibiting their apoptosis [22]. This evidence concerns the gene CCND1 and ovarian teratoma.