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FIG 1. 33-year-old white woman with chronic headache.
A–D, An extraaxial left parietal mass is hypointense on noncontrast T2-weighted MR image (2517/90/1 [TR/TE/excitations]) (A), enhances on contrast-enhanced T1-weighted (533/11/2) image (arrows, B), and is isointense with gray matter on noncontrast T1-weighted image (450/19/2) (arrows, C). Substantial fibrocollagenous material and noncaseating granulomas were seen at biopsy. The patient's symptoms resolved with steroids; however, a T1-weighted image (400/16/2) 28 months later showed only partial regression of the lesion (D).
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