A case of a 6.5-year-old castrated male European Shorthair Cat with an unilateral lesion of the oculomotor nerve is described. Nuclear magnetic resonance imaging revealed a mass in the area of the pituitary gland which could be identified as a somatotrope adenoma by immunochemistry. Unlike the feline somatotrope adenoma cases described in the literature this cat showed clinically no acromegalic features or hyperglycemia. An oculomotor nerve lesion in conjunction with a feline somatotropic pituitary adenoma has also not been described before.
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