Study of ovarian tumors treated at Nagoya University Hospital, 1965-1988.
The relative frequency and the age distribution of ovarian tumors (873 primary and 47 secondary tumors) encountered over 23 years at Nagoya University Hospital were examined with respect to histological type and grade of malignancy. Of the primary neoplasms, common epithelial tumors accounted for 56.6%, sex cord-stromal tumors for 7.3%, and germ cell tumors for 39.5%. Among 296 cases with primary malignant neoplasms, common epithelial type accounted for 75.6%, sex cord-stromal tumors for 4.7%, and germ cell tumors for 19.6%. A review of the literature from Western countries indicated that in Japan, the relative frequency of common epithelial tumors is lower but that of germ cell tumors, especially malignant germ cell tumors, is higher. The difference in the incidence of germ cell tumors between Japan and Western countries is not considered significant, and the incidence of common epithelial tumors is considered to be much lower in Japan.
Nakashima
N
N
Department of Laboratory Medicine, Nagoya University School of Medicine, Japan.
Nagasaka
T
T
Fukata
S
S
Oiwa
N
N
Nara
Y
Y
Fukatsu
T
T
Takeuchi
J
J
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002648:Child; D005260:Female; D006801:Humans; D015994:Incidence; D007564:Japan / Q000453:epidemiology; D008875:Middle Aged; D010051:Ovarian Neoplasms / Q000453:epidemiology / Q000401:mortality / Q000473:pathology* / Q000556:secondary; D015996:Survival Rate