ViRexx Medical Corp, a small CDN biotech company, has a potential tx for Ovarian in late PIII trials. Check out this animation on Ovarex. ViRexx trades on the AMEX under ticker REX. Wiki info: Ovarian cancer is a malignant tumor, of any histology, on or within an ovary. Because many ovarian tumors are benign but have the potential to become malignant, a broad definition of ovarian cancer includes all ovarian tumors, malignant and benign.