Squamous cell carcinoma in situ arising in mature cystic teratoma of the ovary: a case report
© Zakkouri et al; licensee BioMed Central Ltd. 2011
Received: 23 December 2010
Accepted: 24 March 2011
Published: 24 March 2011
Malignant transformation is a rare complication of mature cystic teratoma with squamous cell carcinoma being the most common type. We report a new case of squamous cell carcinoma in situ.
A 62 year old woman was admitted for an abdomino-pelvic mass and she underwent a left salpingo-oophorectomy. The histopathologic analysis revealed a squamous cell carcinoma in situ arising in mature cystic teratoma of the ovary. Then, she underwent a total hysterectomy, contralateral salpingo-oophorectomy and omentectomy without adjuvant treatment.
Optimal cytoreduction has been associated with a statistically significant improvement in survival for malignant transformation of mature cystic teratoma.
Mature cystic teratoma (MCT) is the most common germ-cell tumor of the ovary. It consists of well-differentiated derivatives of the three germ-cell layers . Malignant transformation is a rare complication of this pathology; it accounts for 1-2% of MCTs and the prognosis of this disease is generally poor . In this article, we report a case of MCT who was admitted to National Institute of Oncology in Rabat (Morocco). The diagnosis was proved by histopathologic analysis.
Then she was referred to our institution for treatment. Pelvic examination, thoraco-abdominal computed tomography scan and the serum tumour markers (ßHCG, AFP, LDH and CA125) were normal. She underwent a total hysterectomy, contralateral salpingo-oophorectomy and omentectomy.
The histological examination found a mature cystic teratoma in the contralateral ovary without malignant transformation. Adjuvant treatment was not planned.
Ovarian germ-cell tumours account for around 20-25% of ovarian neoplasms and 5% of cancers of the ovary . Mature cystic teratoma (MCT) is the most common ovarian germ cell tumor (10-20% of all ovarian tumors) . Malignant transformation of mature cystic teratomas is very rare (1-2%), with squamous cell carcinoma being the most common type . Pure squamous cell carcinoma in situ arising in an ovarian cystic teratoma is extremely rare . We have only 5 cases from 1976 to 2005 .
In our case, it's a squamous cell carcinoma in situ arising in ovarian mature cystic teratoma. In most of the series, the median age at diagnosis of malignant transformation of MCT was 54-61.5 years  and the most common symptoms were abdominal pain, palpable mass and abdominal distension; but some people may be asymptomatic at diagnosis . MCT with diameter > 10 cm is associated with increased risk of malignancy in some studies . In our case, the tumor size was 10 cm. Most of studies have found that MCT has a poor prognosis. Early stage and optimal cytoreductive surgery are reported to be good prognostic factors .
Due to the relative rarity of the squamous cell carcinoma in situ arising in MCT, there is no uniform consensus regarding treatment. However, the treatment for many authors consist to a complete tumor excision. Adjuvant chemotherapy or radiotherapy is not helpful in improving survival [4–6].
In the review of the literature from 1976 through to 2005, the optimal debulking rate for carcinoma in situ was 100% and the 5-year survival rate for this disease was 100% .
Squamous-cell carcinoma in situ arising in a mature cystic teratoma is an unusual disorder. Because of the rarity of this disease, there is no therapeutic standard at the moment. However, the prognosis seems highly dependent on complete surgical debulking.
written informed consent was obtained from the patient for publication of this case report and accompanying images.
Mature cystic teratoma
- Stern JL, Buscema J, Rosenshein NB, Woodruff JD: Spontaneous rupture of benign cystic teratomas. Obstet Gynecol 1981, 57: 363–6.PubMedGoogle Scholar
- Peterson WF, Prevost EC, Edmunds FT, Hundley JM Jr, Morris FK: Epidermoid carcinoma arising in a benign cystic teratoma; a report of 15 cases. Am J Obstet Gynecol 1956, 71: 173–89.PubMedGoogle Scholar
- Hackethal Andreas, Brueggmann Doerthe, Michael BohlmannK, Folker FrankeE, Tinneberg Hans-Rudolf, Karsten Münstedt and co: Squamous-cell carcinoma in mature cystic teratoma of the ovary: systematic review and analysis of published data. Lancet Oncol 2008, 9: 1173–80. 10.1016/S1470-2045(08)70306-1PubMedView ArticleGoogle Scholar
- Dos Santos Lisa, Mok Evelyn, Alexia Iasonos, Kay Park, Soslow RobertA, Carol Aghajanian and co: Squamous cell carcinoma arising in mature cystic teratoma of the ovary: a case series and review of the literature. Gynecologic Oncology 2007, 105: 321–324. 10.1016/j.ygyno.2006.12.008PubMedView ArticleGoogle Scholar
- Dadhwal V, Sarkar SK, Arora V, Mittal S: Squamous cell carcinoma in situ arising in mature cystic teratoma. Indian J Pathol Microbiol 2002,45(3):345–6.PubMedGoogle Scholar
- Chen Ruey-Jien, Chen Ko-Yang, Chang Ting-Chen, Sheu Bor-Ching, Chow Song-Nan, Huang Su-Cheng: Prognosis and Treatment of Squamous Cell Carcinoma from a Mature Cystic Teratoma of the Ovary. J Formos Med Assoc 2008.,107(11):
- Dos Santos L, Mok E, Iasonos A: Squamous cell carcinoma arising in mature cystic teratoma of the ovary: a case series and review of the literature. Gynecol Oncol 2007, 105: 321–4. 10.1016/j.ygyno.2006.12.008PubMedView ArticleGoogle Scholar
- Tseng CJ, Chou HH, Huang KG, Chang TC, Liang CC, Lai CH and co: Squamous cell carcinoma arising in mature cystic teratoma of the ovary. Gynecol Oncol 1996, 63: 364–70. 10.1006/gyno.1996.0337PubMedView ArticleGoogle Scholar
- Yamanaka Y, Tateiwa Y, Miyamoto H, Umemoto Y, Takeuchi Y, Katayama K and co: Preoperative diagnosis of malignant transformation in mature cystic teratoma of the ovary. Eur J Gynaecol Oncol 2005, 26: 391–2.PubMedGoogle Scholar
- Park Jeong-Yeol, Kim Dae-Yeon, Kim Jong-Hyeok, Kim Yong-Man, Kim Young-Tak, Nam Joo-Hyun: Malignant transformation of mature cystic teratoma of the ovary: Experience at a single institution. European Journal of Obstetrics & Gynecology and Reproductive Biology 2008, 141: 173–178.View ArticleGoogle Scholar
This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.