Magnetic resonance imaging in a dog with choroid plexus carcinoma.

Choroid plexus carcinoma was diagnosed in a 10-year-old maltese dog with chief complaint of progressive ataxia and head tilt. No abnormalities was observed on hemogram, radiographs of the skull, and electroencepharograph (EEG). Neurological examination suggested central vestibular lesions. On the magnetic resonance imaging (MRI) examination, images after contrast enhancement with Gadolinium DTPA-dimeglumine showed a rough circular lesion with an increased signal intensity in caudal fossa. This lesion was histopathologically confirmed to be choroid plexus carcinoma.