Ocular squamous cell carcinoma in a cow with cerebral invasion through cranial nerves
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A squamous cell carcinoma of the eye was removed from a 7-year-old cow which presented drooping of left ear, drooling and progressive loss of weight. Due to poor prognosis it was euthanatized 9 months after surgery. At necropsy and histopathological examination it was found that the tumor had invaded the brain stem through the cranial nerves. Additional necropsy significant findings included aspiration pneumonia and denervation atrophy of the left temporal muscle.