Evaluation of cytology and histopathology for the diagnosis of feline orbital neoplasia: 81 cases (2004-2019) and review of the literature.

Orbital neoplasia is common in cats, with round cell and epithelial tumors diagnosed most commonly in the study population. Histopathology is superior to cytology in providing a definitive diagnosis. Minimally invasive tissue biopsy techniques appear to be safe and effective.