title: Transmural passage of subarachnoid metrizamide into a cystic acoustic schwannoma of the cerebellopontine angle: a diagnostic dilemma.
abstract: CT metrizamide cisternography performed in a patient with a non-enhancing cerebellopontine angle tumour demonstrated an increase in attenuation within the cystic area between the immediate scan and that undertaken 4 h later indicating delayed inward diffusion of the contrast. At operation the tumour was found to be a cystic acoustic schwannoma of the cerebellopontine angle. Diffusion of metrizamide was not previously been reported across the wall of a cystic tumour.
mesh_terms: D000368:Aged; D002530:Cerebellopontine Angle / Q000000981:diagnostic imaging; D003937:Diagnosis, Differential; D004058:Diffusion; D005260:Female; D006801:Humans; D008793:Metrizamide; D009464:Neuroma, Acoustic / Q000000981:diagnostic imaging*; D014057:Tomography, X-Ray Computed
chemical_list: D008793:Metrizamide