A 1.5-year-old neutered male Border collie was presented with acute onset left forebrain signs and unilateral nasal discharge 14 months after MRI diagnosis of nasal meningoencephalocele. Subsequent MRI revealed intraventricular pneumocephalus with a gas-filled tract extending to the rostral aspect of the intranasal brain parenchyma. Transient clinical improvement was noted with medical management, with euthanasia eight months post diagnosis due to deteriorating neurological status. The diagnoses of intraventricular pneumocephalus and frontoethmoidal meningoencephalocele were confirmed post mortem. This is the first reported case of non-traumatic tension pneumocephalus in a dog and the first report of pneumocephalus associated with a nasal meningoencephalocele in a dog.
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Contributors All authors significantly contributed to the diagnostic investigation of the case described, and to the preparation of the manuscript.
Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.
Competing interests None declared.
Provenance and peer review Not commissioned; externally peer reviewed.
Data sharing statement No additional data are available.
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