Clinicopathological Features of Endometriosis-associated Ovarian Cancer

[Purpose] To investigate the clinicopathological features of endometriosis-associated ovarian cancer (EAOC).[Methods] Twenty-seven cases with EAOC and 184 cases with ovarian cancer without endometriosis from 2002 to 2012 were analyzed retrospectively. Age distribution, pathological types, differentiation and clinicopathological stages of the two groups were compared. [Results] The average age was(47±15) years old in patients with EAOC, which was 5 years younger than that of ovarian cancer patients without endometriosis. Endometrioid type and clear-cell type were predominant in EAOC, however serous type was the common type in ovarian cancer patient without endometriosis. More earlier stages(surgicopathologic staging) were found in patients with EAOC than those in ovarian cancer patients without endometriosis. [Conclusion] Compared with ovarian cancer without endometriosis, EAOC patients are younger, earlier stages, and pathologic types of endometrioid type and clear-cell type in the majority.