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Figure 1. Clinical findings of the cat during the clinical course. (A) At initial presentation, blepharospasm in the right eye was observed. (B) On day 19, corneal ulceration at dorsal site did not improve, and restriction of the eyelids was prominent. (C, D) On day 75, exposure keratitis in the right eye deteriorated due to persisting eyelid restriction, and resistance to posterior ocular compression was observed.
Figure 2. Imaging findings. (A) On day 75, Ultrasound examination detected no obvious mass in both the globe nor in the orbit. (B) On day 138, A computed tomography scan revealed a high intensity space-occupying lesion in the orbit of right eye (*).
Figure 3. Histopathological findings of the tumor. (A) Hematoxylin-eosin staining showed proliferation of bland spindle cells with moderate collagen matrix. (B) Immunohistochemical staining showed moderate cytoplasmic labeling of smooth muscle actin in spindle tumor cells. Scale bar = 200 μm (100×).