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IMAGING DIAGNOSIS—MRI CHARACTERISTICS OF A FOURTH VENTRICULAR CHOLESTEROL GRANULOMA IN A DOG

Authors

  • Mathew C. Lovett,

  • William R. Fenner,

  • Adam T. Watson,

  • Roger A. Hostutler


  • Funding for the diagnostic work-up and treatment plan was provided by the patient's owner. No additional sources of funding were utilized.

Address correspondence and reprint requests to Mathew C.Lovett,. E-mail: mathew.lovett@gmail.com

Abstract

A 2-year-old male American Bulldog experienced paroxysmal staggering, altered consciousness, and hyperesthesia. Magnetic resonance (MR) imaging enabled recognition of a fourth ventricular mass causing compression of the cerebellum and brainstem and obstructive hydrocephalus. The mass was uniformly T2-hyperintense and predominantly T1-hypointense. A fluid line was evident on the fluid-attenuated inversion recovery images. A thin rim of contrast enhancement was noted. Histopathologic diagnosis was a cholesterol granuloma. We were unable to identify any other reports of a cholesterol granuloma residing in the fourth ventricle of a dog. This case report documents the clinical, diagnostic imaging, and histopathologic findings of a canine intracranial cholesterol granuloma. © 2012 Veterinary Radiology & Ultrasound.

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