The treatment of choice in this patient was the orbital exenteration because of the capacity of this tumor to spread throughout the uvea and it was not sure whether scleral infiltration could already exist, although the enucleation could also be indicated. The treatment suggested by the literature, can range from diode laser therapy to microsurgical resection with enucleation or exenteration, depending on the size of the affected region and structures involved. This kind of cancer involves mainly not neutered male dogs, with breed predilection as the German shepherd dogs, Golden Retrievers, Labrador Retrievers and also Poodles, as reported in this case. In this report it was observed a nodular staining quite blackened pigmentation. The pigmentation in these cases may vary from dark colors (black or brown) to white, for example, the amelanotic melanomas. As highlighted by the actual literature, the size of this kind of neoplasm can vary from small to larger nodules and it can causes relevant anatomical changes. The patient was re-examined six months postoperatively and no neoplasm recurrence signs were observed.ĭiscussion : The animal stated in this report showed an increased volume of the right eye and dark pigmentation involving the iris. The extracted eyeball was placed in 10% formalin and sent for histopathological examination, which was later reported as showing an iris melanoma involving the ciliary body and the choroid coat. Due to the bad prognosis of the affected eye, the patient underwent to orbital exenteration procedure. B-mode ultrasonography revealed a mass involving the iris, ciliary body and the choroid coat with perilesional retinal detachment, suggesting iris ciliary body and choroid melanoma. On biomicroscopic examination, using a slit lamp, it was observed an iris distension that was protruding directly into the anterior chamber and a diffuse opacity of the lens. On the ophthalmic examination, the right eye possessed misshapen pupil, hyperemia ocular conjunctiva (+) and diffuse corneal opacity (+) with paracentral pigmentation between 7-10 hour. On the clinical examination, no abnormality was found. The owner initially presented a history of a progressive increase dark-colored intraocular volume in the right eye iris of the dog. The objective of this study is to report a case of iris melanoma involving the ciliary body and the choroid coat of a Poodle, emphasizing its clinical manifestation, diagnosis and treatment.Ĭase : This study reports a case of an intact male canine Poodle, 15 years old, weighing 5 kg that was referred for care to the Veterinary Teaching Hospital of the Federal University of Santa Maria, Brazil. Current treatment of choice is based on the size and the structures involved by the tumor that can range from local resection to orbital exenteration. A complete eye examination and ocular ultrasound will lead to the diagnosis that will be further confirmed through histopathology. Old animals are more affected than the young ones and there is no breed predilection. The ocular melanomas have a low metastatic level in dogs when compared to cats. Mestrado, Programa de Pós-graduação em Medicina Veterinária (PPGMV), Universidade Federal de Santa Maria (UFSM), Santa Maria, RS, Brazil.īackground : Melanoma is a primary ocular neoplasm that may affect the iris, ciliary body, the choroid coat and others components of the eye. Doutorado, Programa de Pós-graduação em Medicina Veterinária (PPGMV), Universidade Federal de Santa Maria (UFSM), Santa Maria, RS, Brazil.
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