TY - JOUR T1 - Idiopathic hypertrophic cranial pachymeningitis with accumulation of thallium-201 on single-photon emission CT. JF - American Journal of Neuroradiology JO - Am. J. Neuroradiol. SP - 450 LP - 453 VL - 19 IS - 3 AU - H Nishioka AU - H Ito AU - J Haraoka AU - Y Yamada AU - H Nojima Y1 - 1998/03/01 UR - http://www.ajnr.org/content/19/3/450.abstract N2 - We report a case of idiopathic hypertrophic cranial pachymeningitis in which a high accumulation of thallium-201 was observed on an early single-photon emission CT (SPECT) scan. The patient's symptoms initially improved with steroid therapy but recurred repeatedly. MR images failed to show any change with treatment; however, thallium-201 uptake correlated closely with the fluctuation of symptoms. 201Tl-SPECT was therefore useful in identifying inflammatory activity that was not detected by MR imaging. ER -