Mature cystic teratoma of the ovary is the most common ovarian germ cell neoplasm comprising (10-20%) of all ovarian tumors and almost always benign, but it can be developed into malignancy rarely. We have recently experienced one case of squamous cell carcinoma arising in mature cystic teratoma of the right ovary in 67-year-old postmenopausal woman. The ovarian tumor was measured 17x12.5x8 cm in size and had not intact capsule, and the peritoneal washing cytology was positive. The survival rate with cancerous dermoid is very poor. Neither of two forms of postoperative treatment (radiotherapy and chemotherapy) has any significant influence on survival. We report above case with a brief review of literature.
Aged ; Carcinoma, Squamous Cell* ; Dermoid Cyst ; Female ; Germ Cells ; Humans ; Ovary* ; Survival Rate ; Teratoma*

Primary ovarian pregnancy is a rare form of ectopic pregnancy, and the prevalence rate is reported to be between 1/7,000 and 1/40,000 pregnancies. Ovarian pegnancy occurs within the ovary and on the corpus luteum, usually with rupture and massive bleeding. It is frequently misdiagnosed as a ruptured corpus luteum and the differentiation may be made only by micoroscopic examination of a tissue specimen. We have experienced four cases of ovarian pegnancy, which are presented with a brief review in the literature.
Corpus Luteum ; Female ; Hemorrhage ; Ovary ; Pregnancy ; Pregnancy, Ectopic* ; Prevalence ; Rupture