The mature cystic teratoma is most common in the ovary, and several authors have reported mature cystic teratoma in female genitalia such as fallopian tube, uterus and pouch of douglas. The mature cystic teratoma in the douglas pouch is very rare, which was reported only twice in the world. The pathogenesis of the mature cystic teratoma in the douglas pouch is not established. We experienced a case of mature cystic teratoma in the douglas pouch associated with pregnancy, which was diagnosed by the ultrasonography at the first trimester of pregnancy and remained at the third trimester of pregnancy without change of size. We report the case with a brief review of literature.
Douglas' Pouch* ; Fallopian Tubes ; Female ; Genitalia, Female ; Humans ; Ovary ; Pregnancy Trimester, First ; Pregnancy Trimester, Third ; Pregnancy* ; Teratoma* ; Ultrasonography ; Uterus