Peer-reviewed veterinary case report
Equine orbital neoplasia: a review of 10 cases (1983-1998).
- Journal:
- The Canadian veterinary journal = La revue veterinaire canadienne
- Year:
- 2000
- Authors:
- Baptiste, K E & Grahn, B H
- Affiliation:
- Department of Veterinary Internal Medicine · Canada
- Species:
- horse
Plain-English summary
This study looked at 10 horses with tumors in their eye sockets, which were all found to be aggressive and hard to treat. The tumors were difficult to classify because they were poorly developed and varied in their cell types. Most of the horses were euthanized between two months and five years after being diagnosed because their condition did not improve, and the tumors either spread or continued to grow. While surgery seemed to help some horses live longer, there wasn't a clear advantage over other treatments like chemotherapy or doing nothing at all. Overall, the outlook for these types of tumors is much worse than for tumors on the eyelids or other areas of the eye.
Abstract
The clinical manifestations, laboratory findings, and survival times of 10 horses with orbital neoplasms are reported. In all cases, orbital neoplasms were malignant and locally invasive with no defined surgical circumscribed edges. It was often difficult to identify the primary cell type of the neoplasia in histologic specimens due to the poorly differentiated, anaplastic nature of the majority of cases. All except one horse were eventually euthanized 2 mo to 5 y after diagnosis due to poor response to treatment, metastasis, or unrelenting orbital neoplasia. Mean survival time increased with surgical treatment, but no significant difference was found among no treatment, chemotherapy, surgical mass removal, or exenteration/enucleation. Equine practitioners should be aware of the marked difference in prognosis of orbital neoplasms compared with ocular or localized eyelid neoplasia.
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Search related cases →Original publication: https://pubmed.ncbi.nlm.nih.gov/10769765/