PT - JOURNAL ARTICLE AU - Battineni, M.L. AU - Galetta, S.L. AU - Oh, J. AU - Lango, M. AU - Brooks, J.J. AU - Schuster, S.J. AU - Loevner, L.A. TI - Idiopathic Hypereosinophilic Syndrome with Skull Base Involvement DP - 2007 May 01 TA - American Journal of Neuroradiology PG - 971--973 VI - 28 IP - 5 4099 - http://www.ajnr.org/content/28/5/971.short 4100 - http://www.ajnr.org/content/28/5/971.full SO - Am. J. Neuroradiol.2007 May 01; 28 AB - SUMMARY: Idiopathic hypereosinophilic syndrome (HES) is a heterogeneous disorder characterized by prolonged eosinophilia without an identifiable cause, ultimately resulting in organ dysfunction. Three major types of neurologic involvement have been well defined in HES; however, to our knowledge, inflammatory pseudotumor (IPT) in association with HES has not been reported. We present a case of IPT of the skull base in a patient with HES that suggests that HES may result in an exaggerated immunologic or inflammatory response leading to the formation of IPT.