Cysticercosis of the cerebellopontine angle cistern mimicking epidermoid inclusion cyst

We report a case of a cystic lesion in the left cerebellopontine (CP) angle cistern. The magnetic resonance (MR) imaging features closely resembled an epidermoid inclusion cyst, and was interpreted as such. However, at surger y and on histopathological examination the lesion was found to be a cystice rcus cyst. It may be impossible to distinguish between the two by imaging. The MR imaging findings of cysticercosis, epidermoid and other common diffe rentials are discussed.