Low-Grade Astrocytoma Arising in a Mature Ovarian Teratoma i
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Germ cell tumors comprise about 20% of all ovarian tumors, most of which occur in children and young adults. Approximately 95% of these are mature cystic teratomas. Mature cystic teratoma is composed of well-differentiated tissues derived from the 3 germ cell layers. Neuroepithelial tissues have been reported to be present in around four-fifths of all ovarian teratomas. Malignant transformation is a rare complication of mature cystic teratoma and usually takes the form of malignant epithelial tumor, mostly squamous cell carcinoma. Gliomas of different types and grades may arise in ovarian teratomas. The purpose of this article is to report a case of low-grade astrocytoma arising on a background of mature ovarian teratoma in an adolescen....

http://www.sciencedirect.com/science/article/pii/S2212955314000258
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