RESUMO
OBJECTIVE: The purpose of this article is to address radiation necrosis, pseudoprogression, and pseudoresponse relative to high-grade gliomas and evaluate the role of conventional MRI and, in particular, dynamic susceptibility contrast-enhanced perfusion MRI in assessing such treatment-related changes from tumor recurrence. CONCLUSION: Posttreatment imaging assessment of high-grade gliomas remains challenging. Familiarity with the expected MR imaging appearances of treatment-related change and tumor recurrence will help distinguish these entities allowing appropriate management.
Assuntos
Neoplasias Encefálicas/diagnóstico , Glioma/diagnóstico , Imageamento por Ressonância Magnética/métodos , Recidiva Local de Neoplasia/diagnóstico , Lesões por Radiação/diagnóstico , Neoplasias Encefálicas/patologia , Neoplasias Encefálicas/radioterapia , Meios de Contraste , Diagnóstico Diferencial , Progressão da Doença , Glioma/patologia , Glioma/radioterapia , Humanos , Necrose/diagnóstico , Necrose/etiologiaRESUMO
An aberrant subarcuate artery and its related canal are rare. The presence of this variation has a surgical significance, that is, risk of hemorrhage, if accidentally nicked. It is therefore important to be aware of this entity, and its relative anatomy, to avoid any untoward complication. We present a case of a 29-year-old man who presented with hearing loss after trauma. High-resolution computed tomographic scan of the temporal bone demonstrated an enlarged subarcuate canal.
