CDKN2B and neoplasm: When stratifying the OCSPCs by origin, the mRNA levels of CCND2 (0.074 ± 0.06 vs. 0.733 ± 0.583, p < 0.001, student’s t test), RASSF1A (0.553 ± 0.164 vs. 2.150 ± 1.630, p < 0.001, student t test) and CDKN2B (0.153 ± 0.056 vs. 1.172 ± 0.740, p < 0.001, student’s t test), but not DLC1 (1.471 ± 0.573 vs. 1.985 ± 1.099, p = 0.374, student t test) were significantly lower in the epithelial-like OCSPCs from ascites than those from bulk tumor tissues.