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Sacrococcygeal teratoma with malignant transformation in an adult female: CT and MRI findings

Departamentos de ¹ Imagiologia, ² Patologia Morfológica e ³ Oncologia Médica, Instituto Português de Oncologia de Francisco Gentil (I.P.O.F.G.) Centro Regional de Lisboa, R. Prof. Lima Basto, 1099-023 Lisboa Codex, Portugal

Correspondence: M^a Margarida Monteiro, Serviço de Radiologia, Hospital da Força Aérea, Azinhaga dos Ulmeiros, 1600-777 Lisboa, Portugal. E-mail: hfa.imagiologia@emfa.pt

This report describes a case of sacrococcygeal teratoma with adenocarcinomatous transformation in a 45-year-old woman. This is an infrequent location for teratoma in adults and malignant transformation has rarely been described. Prognosis depends on complete excision. Clinical manifestations, imaging aspects and histological findings of this case are presented. CT and MRI adequately document the mixed cystic and solid nature of the tumour, its extension and relations with adjacent structures, allowing accurate pre-operative planning.

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