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Case Reports
. 2015 Jul 14;1(2):2055116915593970.
doi: 10.1177/2055116915593970. eCollection 2015 Jul-Dec.

Supratentorial arachnoid cyst management by cystoperitoneal shunt in a 1-year-old European cat

Mathieu Taroni  1 , Marie-Jose Seurin  2 , Claude Carozzo  1 , Catherine Escriou  1
Affiliations
Case Reports

Supratentorial arachnoid cyst management by cystoperitoneal shunt in a 1-year-old European cat

Mathieu Taroni et al. JFMS Open Rep. .

Abstract

Arachnoid cysts are defined as an accumulation of fluid within the arachnoid membrane. Feline intracranial arachnoid cysts are seldom reported, with only three cases in the veterinary literature. A 1-year-old male neutered European cat with a 24 h history of seizures was presented to the small animal neurology department at Vetagro Sup, Lyon. Magnetic resonance imaging (MRI) revealed a large intracranial arachnoid cyst ventral to the brain in the left temporal area. Cystoperitoneal shunt placement resulted in complete resolution of the cyst without recurrence (follow-up MRIs 3 weeks and 21 months after surgery). Anticonvulsant treatment (phenobarbital 2.5 mg/kg q12h) was initiated at presentation and gradually stopped after 17 months. Seizures recurred 4 months after ending treatment, and seizure therapy was therefore restarted at the initial dose. We report a case of an intracranial arachnoid cyst in an unusual location not previously described. A cystoperitoneal shunt resolved the cyst without complications. Maintenance anticonvulsant treatment was required to control symptomatic epilepsy.

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Conflict of interest statement

Conflict of interest: The authors do not have any potential conflicts of interest to declare.

Figures

Figure 1
Figure 1
T1-weighted transverse magnetic resonance image (left) demonstrating a hypointense extra-axial lesion in the left temporal lobe (open arrowhead). The lesion is hyperintense in T2-weighted images (right)
Figure 2
Figure 2
T1-weighted parasagittal magnetic resonance image demonstrating a hypointense lesion in the left temporal lobe (open arrowhead)
Figure 3
Figure 3
T1-weighted transverse magnetic resonance image demonstrating postoperative reduction of the cyst. The catheter can be observed as a hypointense signal on the right (filled arrowhead)
Figure 4
Figure 4
Magnetic resonance images demonstrating postoperative reduction of the cyst. (a,c) T2-weighted image signal abnormalities (diffuse hyperintensity) in the former cyst location (filled arrowhead) at (a) 3 weeks and (c) 21 months after surgery. (b,d) T1-weighted image showing parenchymal atrophy in the former cyst location (open arrowhead) compared with the contralateral side at (b) 3 weeks and (d) 21 months
See this image and copyright information in PMC

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