Here, we used immunohistochemistry (IHC) on tissue microarrays (TMA) to examine the prognostic role of 29 previously identified RNA-based biomarkers for histotype-specific, early-stage ovarian carcinoma [11 biomarkers associated with CCC (ARPC2, CCT5, DDX24, GNB1, KCTD10, NUP155, RPL13A, RPL37, SETD3, SMYD2, TRIO), eight with EC (ABCA12, CECR1, ESRRG, KIF26B, MUC15, PDE4DIP, PIK3CA, RIMBP2), and 10 with MC (CENPI, CHEK1, FOXM1, KIF15, KIF23, KNTC1, MTGR1, NSD2, PARPBP, ZDHHC2)]. The gene discussed is ADA2; the disease is ovarian carcinoma.