Kolkata, May 8 (UNI) Ranking as the third most frequent cancer affecting women in India, ovarian maligancy is found in approximately 6.8 cases per 100,000 females in the country, a renowned expert said here on Thursday quoting Indian Council of Medical Research (ICMR) data On the occasion of World Ovarian Cancer Day, acclaimed gynaecological oncologist Asima Mukhopadhyay stressed the critical need for early detection in treating ovarian cancer- an insidious malignancy that continues to elude timely diagnosis in the vast majority of cases.