Orbital neurofibrosarcoma in a dog

Abstract

A young dog was presented with rapidly progressive, unilateral, exophthalmos. Ultrasound-guided fine-needle aspiration of the retrobulbar mass resulted in a diagnosis of fibrosarcoma. Magnetic resonance imagery revealed tumor invasion into the brain, and palliative therapy was elected. The dog was euthanized 4 weeks following diagnosis due to progressive neurological signs. The final diagnosis was neurofibrosarcoma involving the pons, brainstem, left orbit and left trigeminal nerve.

Use of methyl methacrylate, moulded in its paste phase, to fill the orbital cavity of dogs, after exenteration in cases of ophthalmic neoplasias: a report of three cases

“…The altered function of orbital content can be observed as diminished ocular mobility, strabismus, blindness, anisocoria, episcleral vessels congestion and increase or decrease of lacrimal production (SPIESS & WALLIN-HÄKANSON, 1999). Other clinical signs associated with retrobulbar or orbital disease include protrusion of the gland of the third eyelid, exposure keratitis, glaucoma, retinal detachment and dysphagia (ANDREW, 1999). In this study, the main alterations were exophthalmos with discreet lagophthalmos, strabismus, protrusion of the gland of the third eyelid, severe conjunctival congestion, severe chemosis, glaucoma and keratitis.…”

“…Orbital space-occupying mass results in the displacement of orbital contents and it causes alteration in their volume or their functions (ANDREW, 1999;SPIESS & WALLIN-HÄKANSON, 1999). Alterations in volume are presented as exophthalmos with or without pain.…”

“…Exposure keratitis occurs when the eyelids cannot cover the surface of globe, or if trigeminal or/and facial nerves involvement has ocurred. Glaucoma and retinal detachments result of tissue compression by neoplasia (ANDREW, 1999).…”

“…The treatment of orbital neoplasms include exenteration with or without orbitotomy, irradiation and/or chemotherapy (ANDREW, 1999). The authors decided to perform exenteration because it is cheaper than other techniques.…”

Retrobulbar Rhabdomyosarcoma in a Hovawart

“…Barnet and G r i mmes (1972) mention the occurrence of retinal detachment. When the tumour affects the nerve tissue, there may be progressive neurological signs (Andrew 1999). Radiographs often show osteolysis (Mason et al 2001).…”