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Subretinal Transplantation of Human Embryonic Stem Cell-Derived Retinal Tissue in a Feline Large Animal Model

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Acquired arachnoid cyst in a cat.

T Sugiyama¹, D J Simpson

¹Animal Referral Hospital, South Strathfield, New South Wales 2136, Australia. stakanori@hotmail.com

Australian Veterinary Journal

|July 4, 2009

Summary

A cat with recurrent hindlimb paresis was diagnosed with a spinal arachnoid cyst. Surgical intervention provided temporary relief, but progressive neurological decline led to euthanasia.

Area of Science:

Veterinary Neurology
Neurosurgery
Comparative Medicine

Background:

A Birman cat experienced paraparesis due to a thoracic vertebral fracture, initially managed conservatively.
Recurrence of hindlimb paresis and ataxia prompted further investigation 4 years post-trauma.

Observation:

Magnetic resonance imaging (MRI) revealed a spinal arachnoid cyst, treated surgically with dorsal laminectomy and durectomy.
Repeat imaging (myelography and CT-M) after a second recurrence showed cerebrospinal fluid (CSF) pooling at the surgical site.
Progressive spinal cord atrophy was noted on repeat CT-M, despite minimal CSF pooling.

Findings:

Initial conservative management of vertebral fracture led to temporary recovery.
Surgical treatment of spinal arachnoid cyst resulted in functional recovery, but symptoms recurred.

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Subsequent surgery improved but did not fully resolve neurological deficits, leading to chronic paresis and ataxia.

Progressive spinal cord atrophy indicated irreversible damage despite management of CSF dynamics.

Implications:

Spinal arachnoid cysts can cause recurrent neurological deficits in cats, necessitating advanced imaging and surgical intervention.
Recurrence of signs post-surgery may indicate complications like CSF pooling or progressive spinal cord changes.
Long-term outcomes for spinal arachnoid cysts in cats can be variable, with potential for progressive deterioration.
This case highlights the challenges in managing complex spinal conditions in veterinary neurosurgery.