?:definition
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An extremely rare, benign or malignant germ cell tumor characterized, clinically, by a teratoma presenting in an extragonadal location (for example retroperitoneum, mediastinum, craniofacial or sacrococcygeal region, intraosseous, solid organs) and histologically by displaying well-differentiated structures as well as immature elements. Presenting symptoms are variable depending on size and location of tumor.
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An extremely rare, benign or malignant germ cell tumour characterised, clinically, by a teratoma presenting in an extragonadal location (for example retroperitoneum, mediastinum, craniofacial or sacrococcygeal region, intraosseous, solid organs) and histologically by displaying well-differentiated structures as well as immature elements. Presenting symptoms are variable depending on size and location of tumour.
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