MR and Tc-99m HMPAO SPECT images in a case of unusual widening of perivascular spaces (Virchow-Robin spaces)

We report a rare case of unusual widening of perivascular spaces (Virchow-R obin spaces). MR images showed multiple small round cystic areas along the perforating me dullary arteries with signal intensity identical to the cerebrospinal fluid predominantly in the right cerebral white matter. Tc-99m HMPAO SPECT images showed no remarkable laterality and no definite i schemic lesion, and the neurological status of the patient was not remarkab le. MR was a diagnostic examination and Tc-99m HMPAO SPECT was a useful supplem entary examination in the evaluation of this case of unusual widening of Vi rchow-Robin spaces.