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Vol. 54. Issue 1.
Pages 59-64 (January - February 2012)
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Vol. 54. Issue 1.
Pages 59-64 (January - February 2012)
Original report
Magnetic resonance imaging of infratentorial anaplastic ependymoma in children
Resonancia magnética en el ependimoma anaplásico infratentorial pediátrico
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M.I. Martínez Leóna,??
Corresponding author
marcela338@hotmail.com

Corresponding author.
, M. Vidal Denisa, B. Weil Larab
a Sección de Radiología Pediátrica, Servicio de Radiodiagnóstico, Hospital Materno-Infantil del Complejo Hospitalario Universitario Carlos Haya, Málaga, Spain
b Servicio de Anatomía Patológica, Hospital Materno-Infantil del Complejo Hospitalario Universitario Carlos Haya, Málaga, Spain
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Table 1. Summary of the characteristics of the infratentorial anaplastic ependymomas in our series.
Abstract
Objective

To show the main findings for anaplastic ependymoma on MRI.

Material and methods

We reviewed all patients diagnosed with anaplastic ependymoma at our tertiary hospital during a six-year period.

We recorded the MRI findings for this type of tumor (on conventional sequences following the protocol for the study of CNS tumors, diffusion-weighted imaging, contrast-enhanced sequences, and MR spectroscopy).

Results

Our series comprises seven children with infratentorial anaplastic ependymoma. We found no definitive characteristics to distinguish between grade II and grade III tumors before histology, as none of the lesions had spread to the cerebrospinal fluid at diagnosis or showed increased restriction in the diffusion-weighted sequence.

Conclusions

The MRI characteristics cannot definitively distinguish between grade II ependymomas and anaplastic grade III ependymomas. Only a few details about diffusion and dissemination to the cerebrospinal fluid, if present, can distinguish between these types at imaging.

Keywords:
Ependymoma
Anaplastic ependymoma
Magnetic resonance imaging
Resumen
Objetivo

El objetivo es mostrar las principales características radiológicas que el ependimoma anaplásico puede presentar en las imágenes de resonancia magnética (RM).

Material y métodos

Se recogen los pacientes diagnosticados de ependimoma infratentorial de tipo anaplásico en los últimos 6 a años en nuestro hospital terciario.

Se estudian las características de imagen mediante RM (secuencias convencionales protocolizadas para estudio tumoral del SNC, difusión, estudio con contraste, espectroscopia) de este tipo tumoral.

Resultados

El estudio de nuestra serie de 7 pacientes pediátricos con ependimoma anaplásico infratentorial no mostró características definitivas que ayudaran en la distinción entre grado II y grado III previamente al diagnóstico anatomopatológico, al no haber presentado ninguno de ellos diseminación al líquido cefalorraquídeo (LCR) en el momento del diagnóstico ni aumento de la restricción tumoral en la secuencia de difusión.

Conclusiones

Las características radiológicas no son definitivas para distinguir entre los ependimomas grado II y los ependimomas anaplásicos grado III. Únicamente algunos detalles sobre la difusión y la mayor propensión a la diseminación al LCR, si se presentan, pueden diferenciarlos desde el punto de vista de la imagen.

Palabras clave:
Ependimoma
Ependimoma anaplásico
Resonancia magnética

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