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Ovarian tumors are the most common type of lesion encountered in the ovary, and they are a common form of noplasia in women, therefore ovarian tumors is important in women but the origin of ovarian tumor in often poorly understood because of complexity of ovarian structure. ovarian cancer accounts for about one-fifth of malignant tumors that occur in this reproductibe tract system. Recently, the method of early diagnosis and treatment of other malignant tumors such as carcinoma of the cervix, endometrial carcinoma and choriocarcinoma etc. was significantly improved, but those of ovarian caroinoma was not. This study was undertaken to investigate clinico-pathologic studies of the ovarian tumors among Korean women, Clinico-pathologic studies were on 807 cases of non-neoplastic and neoplastic ovarin tumors, that were admitted to the department of obstetric and gynecology, Yonsei university, College of Medicine, during the period of abort 10 years from 1966 to 1975. the ovarian tumors were classified by the Novak`s classification. the results were followings; 1) among 807 cases, 413 cases (51.2%) were non-neoplastic and 394 cases(48.8%) were neoplastic ovarian tumors among the all neoplastid ovarian tumors, Metastatic tumors among malignant tumors were 5 cases.(1.3%). 2) Among neoplastic ovarian tumors, cystic teratomas (149 cases, 37.8%) ranked first followed by serous cystadenoma (70 cases, 17.7 %) and mucinous cystadenoma (68 cases, 17.2%) in order of frequency. 3) Mean age of non-neoplastic ovarian cyst was 39.1 years and neoplastic ovarian tumors was 36.8 years, mean age of benign ovarian tumors was 36.0 years and malignant one was 41.4 years. 4) In the ovarian tumors, abdominal discomfort, and abdominal Pain (38.1%) ranked first followed by abdominal palpable mass (33.8%) and vaginal bleeding and irregular menstruation (15.7%). 5) Ascites was 2.4% in benign ovarian tumors and 45.8% in malignant ovarian tumors. 6) Mean diameter was 10.1cm in benign ovarian tumors and 28.8% in malignant one. 8) papillary projection of serous tumors was relatively more than one of mucinous tumors. 9) Ovarian tumors assiciated with pregnancy was 21.3% in non-neoplastic ovarian tumors and 11.4% in all ovarian tumors. 10) Main operative indication in non-neoplastic ovarian cysts were ectopic pregnancy (21.8%), myoma of the uterus (21.3%)and ovarian tumors (20.6%)
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