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Korean Journal of Obstetrics & Gynecology 2001;44(3):606-611.
Published online March 1, 2001.
A Case Of Squamous Cell Carcinoma Arising In A Mature Cystic Teratoma Presenting As Rectal Mass.
Yeon Jung Kim, Jin Ho Jeong, Sung Bum Cho, Chang Soo Park, Bo Hyun Kim, Duk Soo Bae, Je Ho Lee
1Department of Obstetrics and Gynecology, Samsung Medical Center, Sungkyunkwan University,College of Medicine, Seoul, Korea.
2Department of Diagnostic Radiology, Samsung Medical Center, Sungkyunkwan University,College of Medicine, Seoul, Korea.
Ovarian squamous cell carcinoma constitutes less than 2% of all gynecologic malignancy. Most of ovarian primary squamous cell carcinoma arise in mature dermoid cyst. Malignant transformation occurs in less than 2% of benign mature teratoma. Of all three germ layers, the ectoderm is thought to be commonest to undergo malignant change, hence sguamous cell carcinoma is by far the most frequent seen tumor that is over 80% of reported cases in large series followed by the much rare adenocarcinoma, melanoma, and carcinoid. Most patients of ovarian squamous cell carcinoma were postmenopausal. Several authors had reported the poor prognosis of this malignancy but there is no consensus on optimal therapy. Due to its rarity, there is also no consensus regarding the efficacy of postoperative therapy. A Rare presenting symptom associated ovarian squamous cell carcinoma is rectal mass secondary to invasion into the distal rectum. We also present a case of rectal invasion of ovarian squamous cell carcinoma.
Key Words: Ovarian squamous cell carcinoma, Malignant transformation, Mature dermoid cyst

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