Sub-arachnoid diverticulum associated with feline infectious peritonitis in a Siberian cat

Christopher Hoey, George Nye, Angela Fadda, Janet Bradshaw, Emi N Barker*

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

1 Citation (Scopus)
85 Downloads (Pure)


Case summary
A 7-month-old Siberian cat was presented for investigation of acute onset multi-focal neurological deficits. Neurological examination documented dull mental status and an ambulatory left hemiparesis. Serum biochemistry documented marked hyperglobulinaemia. MRI of the brain identified marked leptomeningeal contrast-enhancement extending along the brainstem caudally to involve the cranial cervical spinal cord. MRI of the cervical spine further identified a sub-arachnoid diverticulum that extended from the level of the obex to the C2-C3 vertebra. Cerebrospinal fluid quantitative reverse transcriptase polymerase chain reaction was positive for the presence of feline coronavirus. Histopathology revealed pyogranulomatous meningitis and choroid plexitis, uveitis and nephritis.

Relevance and novel information
This report describes the first reported case of a sub-arachnoid diverticulum associated with feline infectious peritonitis.
Original languageEnglish
Number of pages8
JournalJournal of Feline Medicine and Surgery Open Reports
Issue number2
Early online date19 Oct 2020
Publication statusE-pub ahead of print - 19 Oct 2020


  • FIP
  • MRI
  • neurolocalisation
  • spinal cord


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