Extracranial glioblastoma (GB) metastasis is an uncommon entity, rarely described in the literature, representing 0.2% of cases of GB. Several theories have been proposed to explain the extracranial dissemination of GB, such as surgical interventions, ventriculoperitoneal shunt, and radiation therapy. We present a case of a 15-year old adolescent girl, with an initial diagnosis of low-grade glioma and later transformation to a high-grade glioma. In the final phase of the disease, the patient presented with distention and abdominal pain, secondary to peritoneal compromise of GB metastasis. The use of new therapies has increased survival times, leading to a rise in the probability of developing extracranial metastasis.

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The purpose of this paper is to report a rare case of a pediatric pineal gliosarcoma. Gliomas on the pineal region are uncommon, representing 0.4%-1% of all brain tumors. Furthermore, pediatric gliosarcomas are a very rare entity. We present a case of a 5-year-old girl, with a history of headache, vomiting, diplopia, and gait disturbances. A pineal tumor was found with pathology results consistent with a gliosarcoma. A total of 25 cases of pediatric gliosarcomas have been reported, none of them in pineal topography. Only 3 gliosarcomas were found in the pineal region, but these were found in adults. To our knowledge, this is the first pediatric pineal gliosarcoma reported in the literature.

IntroducciónEl primer caso reportado de uso de resonancia magnética durante el embarazo fue en 1983, para confirmar la presencia de acretismo placentario 1 . En las últimas tres décadas la resonancia magnética fetal (RMF) ha revolucionado el diagnóstico en útero de patologías fetales, ya que tiene muchas ventajas sobre la ultrasonografía (US) prenatal, no está limitada por obesidad materna, la posición fetal o la presencia de Cali -Colombia. Rev Chil Radiol 2017; 23(4): 187-192.

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