Clinical signs, imaging findings , and outcome in twelve cats with internal ophthalmoparesis / ophthalmoplegia

Fonte: Negar Hamzianpour, Richard Lam, Roser Tetas and Elsa Beltran

6.75-year-old, male neutered, Domestic Short-hair cat with anisocoria due to internal ophthalmoplegia of the right eye.
   6.75-year-old, male neutered, Domestic Short-hair cat with anisocoria due to internal ophthalmoplegia of the right eye.

Objective: To retrospectively evaluate the clinical signs, imaging findings, and outcome of feline internal ophthalmoparesis/ophthalmoplegia. Procedure: Medical records were reviewed from 2008 to 2015. Inclusion criteria: included cats that presented with internal ophthalmoparesis/ophthalmoplegia, under-went diagnostic imaging, and had follow-up information available . Results: Twelve cases of ophthalmoparesis/ophthalmoplegia were identified. Nine cats were unilaterally affected, and three cats were bilaterally affected. Affected cats had a median age of 10.54 years (range 5.75 to 13.17), and both sexes of varying breeds were affected (nine males; three females). Clinical signs including abnormal mental status (n = 9; 75%) and additional neurologic abnormalities ( n = 10; 83%)were observed. Magnetic resonance imaging and/or compute d tomography (MRI/CT)of the head were performed in ten cats, revealing a mass lesion in all cases with vary-ing locations. Multicentric lymphoma was diagnosed in two cats via abdominal ultra-sound and cytology. All twelve cats were euthanized due to deterioration of clinical signs and/or quality-of-life concern s. Median time from diagnosis to euthanasia was3.5 days (range 0 to 80 days).Conclusions Feline internal ophthalmoparesis/ophthalmoplegia rarely presents as the sole clinical sign in a referral hospital. Advanced imaging (MRI/CT) may be necessary to reach a definitive diagnosis in these cases. However, abdominal ultrasound would be advocated in cats with systemic clinical signs as a less expensive and less invasive diagnostic test to further investigate the possible etiology of internal ophthalmoparesis/ophthalmoplegia prior to advanced imaging. Feline cases with internal ophthalmoparesis/ophthalmoplegia associated with other intracranial signs and/or systemic clinical signs have a poor prognosis


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