Mature cystic teratoma is one of the more common ovarian neoplasms; however, teratoma in the pouch of Douglas is extremely rare, and the exact etiology is unknown. Here, we report a rare case of mature cystic teratoma of Douglas' pouch in a 40-year-old woman who had undergone laparotomy. A 15 cm x 15 cm x 10 cm cyst was noted arising from the pouch of Douglas, and the mass was seen separated from both ovaries. Microscopically, the cyst was a mature cystic teratoma not arising from the ovaries.
Keywords: benign teratoma; cystic teratoma; mature teratoma; teratoma; teratoma in douglas’ pouch.
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