Intracranial intra-arachnoid cyst with intracystic hemorrhage in two dogs

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31 Scopus citations


Clinical signs, magnetic resonance imaging (MRI) features, treatment, and outcome of two adult dogs with neurologic dysfunction resulting from hemorrhage into a quadrigeminal intracranial intra-arachnoid cyst are described. In dog 1, the cyst was hyperintense to cerebrospinal fluid (CSF) on T1-weighted MRI and hypointense to CSF on T2-weighted images. In dog 2, the cyst was isointense to CSF on T1- and T2-weighted images. Both dogs were treated with craniotomy and cyst fenestration. A large blood clot was removed from the lumen of the cyst in each dog. Dog 1 is clinically normal 3.5 years post-surgery and has a persistent cyst. Dog 2 had a good initial response to therapy but was euthanized 2.5 years post-operatively due to generalized seizures. The late onset of clinical signs in these dogs most likely resulted from hemorrhage into the cyst. Surgical fenestration and hematoma removal appear to provide a satisfactory treatment for adult dogs with an intracranial intra-arachnoid cyst and intracystic hemorrhage. Persistence of the cyst may occur in some dogs.

Original languageEnglish (US)
Pages (from-to)449-454
Number of pages6
JournalVeterinary Radiology and Ultrasound
Issue number5
StatePublished - Sep 2002


  • Arachnoid cyst
  • Brain
  • Cyst
  • Dog
  • Hemorrhage
  • Magnetic resonance imaging

ASJC Scopus subject areas

  • veterinary(all)


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