Abstract
Los ependimomas constituyen la neoplasia más frecuente de la médula espinal. Se desarrollan a partir de células que revisten el canal ependimario. Un subtipo infrecuente es el ependimoma de células gigantes, del que se han descrito solo 8 casos en dicha localización. Describimos el caso de un varón de 42 años con lumbalgia de varios meses de evolución. La RMN mostró un tumor bien circunscrito intradural en L1, que se resecó en su totalidad. El estudio histológico demostró proliferación fusocelular de distribución perivascular con formación de pseudorrosetas y moderada atipia citológica con células gigantes multinucleadas. El estudio inmunohistoquímico confirmó el diagnóstico de ependimoma de células gigantes. Ependymomas are the most frequent neoplasms of the spinal cord, arising from the cells lining the spinal canal. Among them, giant cell ependymoma is a rare subtype with only 8 cases previously reported to date. We present a further case in a 42-year-old man who presented with a history of lower back pain for several months. The MRI revealed a well-circumscribed interdural mass at L1. The tumour was totally resected and histologically it was seen to be comprised of a proliferation of fusiform cells arranged in a perivascular pattern with pseudorosettes and cytologic atypia with multinucleated giant cells. Immunohistochemistry confirmed the diagnosis of giant cell ependymoma.
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