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  • Title: Malignant transformation of intracranial mature teratoma to yolk sac tumor after late relapse. Case report.
    Author: Utsuki S, Oka H, Sagiuchi T, Shimizu S, Suzuki S, Fujii K.
    Journal: J Neurosurg; 2007 Jun; 106(6):1067-9. PubMed ID: 17564180.
    Abstract:
    The recurrence of intracranial mature teratomas as germ cell tumors of different histological types is rarely reported. The authors describe the first case of the malignant transformation of an intracranial mature teratoma into a yolk sac tumor in a 16-year-old boy who presented with a 1-month history of anorexia and somnolence. Seven years prior to this presentation, the boy had undergone surgery for extirpation of a mature pineal teratoma. Computed tomography images obtained at his second presentation revealed a homogeneously enhanced mass within the third ventricle. The tumor was resected and the results of a histological examination were consistent with a yolk sac tumor. After resection, the patient underwent radiation therapy followed by chemotherapy with cisplatin and etoposide but died of tumor progression 15 months after his second hospitalization.
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