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Canine choroidal melanoma with metastases
Jennifer A Hyman1, Seth A Koch, Brian P Wilcock
1Animal Eye Clinic, Silver Spring, MD 20910, USA. jahyman61@yahoo.com
Veterinary Ophthalmology
|June 20, 2002
Summary
This study reports the first definitive case of canine choroidal melanoma with metastasis. A Golden Retriever developed metastatic melanoma 21 months after orbital surgery for a primary choroidal tumor.
Area of Science:
- Veterinary Ophthalmology
- Canine Oncology
Background:
- Choroidal melanomas are rare intraocular tumors in dogs.
- Retinal detachment and exophthalmos can be presenting signs.
Observation:
- A Golden Retriever presented with unilateral retinal detachment and exophthalmos.
- Ultrasonography revealed an intra- and extraocular mass.
- Surgical orbital exenteration was performed.
Findings:
- Histopathology confirmed a primary choroidal melanoma with orbital extension.
- Despite benign cytologic features, metastasis occurred 21 months post-surgery.
- Necropsy revealed metastatic melanoma in the lungs and liver.
Implications:
- This case highlights the potential for canine choroidal melanoma to metastasize.
- Early detection and complete surgical removal are crucial.
- Further research into canine ocular melanoma behavior is warranted.