According to research in the last 10 years, 82.7% of lung cancer samples showed moderate and high Hsp90 level [41], 50% high Hsp90 level of the Undifferentiated pleomorphic sarcoma [42], Hsp90 was expressed in in 63.5% samples of the breast cancer [43], 50% high Hsp90 level of the gastric cancer [44], over expression of Hsp90 was observed in 76.74% of non muscle invasive bladder cancer samples [45], but studies on Hsp90 level in OC have not been defined. Here, HSP90AA1 is linked to gastric cancer.