Prevalence of ovarian endometriosis in epithelial ovarian cancer.
OBJECTIVE
The objective of this study was to examine the occurrence of ovarian endometriosis in epithelial ovarian cancer in Japan.


METHODS
The presence of ovarian endometriosis was determined by reviewing the sections of resected specimens in 172 epithelial ovarian cancers.


RESULTS
The incidence of ovarian endometriosis in ovarian cancer (14.5%) was higher than that in Western countries. The rank order of incidence of endometriosis in each histologic type was clear cell (40.6%)>endometrioid (23.1%)>serous (8.7%)>mucinous (2.9%). The incidence in serous type was higher when compared with that reported in Western countries. The higher incidence of endometriosis in Japan can be explained by a greater proportion of clear cell type, comprising 18.6% of all the cases and a higher incidence of endometriosis in the serous type.


CONCLUSIONS
The association of ovarian endometriosis with epithelial ovarian cancer was more frequently found in Japan.
Jimbo
H
H
Department of Obstetrics and Gynecology, Faculty of Medicine, University of Tokyo, Japan.
Yoshikawa
H
H
Onda
T
T
Yasugi
T
T
Sakamoto
A
A
Taketani
Y
Y
D018262:Adenocarcinoma, Clear Cell / Q000453:epidemiology; D000367:Age Factors; D018269:Carcinoma, Endometrioid / Q000453:epidemiology; D018282:Cystadenocarcinoma, Mucinous / Q000453:epidemiology; D018284:Cystadenocarcinoma, Serous / Q000453:epidemiology; D004715:Endometriosis / Q000453:epidemiology*; D005260:Female; D006801:Humans; D015994:Incidence; D007564:Japan / Q000453:epidemiology; D008593:Menopause; D008875:Middle Aged; D010049:Ovarian Diseases / Q000453:epidemiology*; D010051:Ovarian Neoplasms / Q000453:epidemiology*; D010298:Parity; D015995:Prevalence