Uppsala, Sweden – November 09, 2007 – New research explains why some ovarian cancer patients are dying, while others survive, despite similar surgical and post-operative treatment. The findings show that the difference between life and death can many times be explained by the different biological properties of the tumors. Understanding ovarian cancer biomarkers, such as clear cell tumors, and the exploration of specific tumor-targeted therapy, such as DNA profiling, will improve early stage diagnosis.