Cerebral tumor or pseudotumor?

Abstract : Pseudotumoral lesions are uncommon but important to identity lesions. They can occur during inflammatory diseases (systemic diseases, vasculitis, demyelinating diseases), infectious, and vascular diseases. Also, in a patient with a treated tumor, pseudo-progression and radionecrosis must be differentiated from the tumoral development. Diagnosis can be difficult on an MRI scan, but some MRI aspects in conventional sequences, diffusion, perfusion and spectroscopy can suggest the pseudotumoral origin of a lesion. Imaging must be interpreted according to the context, the clinic and the biology. The presence of associated intracranial lesions can orientate towards a systemic or infectious disease. A T2 hyposignal lesion suggests granulomatosis or histiocytosis, especially if a meningeal or hypothalamic-pituitary involvement is associated. Non-tumoral lesions are generally not hyperperfused. In the absence of a definitive diagnosis, the evolution of these lesions, whether under treatment or spontaneous, is fundamental.
Type de document :
Article dans une revue
Diagnostic and Interventional Imaging, Elsevier, 2014, 95 (10), pp.906-16. 〈10.1016/j.diii.2014.08.004〉
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Contributeur : Olivier Colliot <>
Soumis le : mercredi 6 janvier 2016 - 12:15:45
Dernière modification le : samedi 24 novembre 2018 - 01:40:34

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D Leclercq, S Trunet, Anne Bertrand, Damien Galanaud, S Lehéricy, et al.. Cerebral tumor or pseudotumor?. Diagnostic and Interventional Imaging, Elsevier, 2014, 95 (10), pp.906-16. 〈10.1016/j.diii.2014.08.004〉. 〈hal-01251506〉



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