By global mRNA microarray profiling in a total of 196 epithelial OC patients (161 serous, 15 endometrioid, 11 mucinous, and 9 clear cell carcinomas), we found four candidates—HSPA1A, CD99, RAB3A and POM121L9P, which associated with OS and poor clinicopathological features. This evidence concerns the gene RAB3A and clear cell adenocarcinoma.