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Research Article


Equine conjunctival haemangiosarcoma: Clinical presentation, management, and outcome of seven cases in the United Kingdom

Andrea Kashani-Carver, Conor O'halloran, Emma Scurrell, Heidi Featherstone, Felipe Ferreira de-Freitas, Robert Lowe.


Abstract
Background:
Only 27 cases of equine conjunctival haemangiosarcoma have been reported in the literature over the past 37 years. Out of these, 22% of cases were lost to follow-up, 52% were euthanised and 26% survived. A scarcity of cases and information is available for this rarely seen conjunctival tumour.
Aim:
To describe the clinical features, management, and outcome for conjunctival hemangiosarcoma in seven horses in the UK.
Methods:
Optivet medical records were reviewed for equine cases seen, or advised on, with a histopathological diagnosis of conjunctival haemangiosarcoma between January 2013 and March 2023. Medical records were accessed for details of signalment, history, management, and follow-up. Histopathology was used to confirm the diagnosis of haemangiosarcoma and assess the surgical margins. Immunohistochemistry was performed in a minority of cases with poorly differentiated solid tumours to support vascular lineage.
Results:
Seven eyes from 7 horses (5 geldings and 2 mares) with a mean age of 16 years and median of 18 years (range 10-21 years) met the criteria. Serosanguinous discharge was seen in 6 eyes. All eyes were managed surgically; 4 by exenteration and 3 by conjunctivectomy/keratectomy. Adjunctive cryotherapy was performed in 2 eyes. Metastatic disease in the ipsilateral parotid salivary gland, confirmed with histopathology, was seen in 1 horse. Surgical margins were clear in all but 1 eye. Solar elastosis was noted in 5 eyes. All horses were healthy at the last follow-up (0.2 – 5 years, mean 2.9 years, median 2 years).
Conclusion:
Equine conjunctival haemangiosarcoma is rare. Serosanguinous ocular discharge is a common clinical sign. Early surgical excision is highly effective. Solar elastosis is a common histopathological feature, suggesting a role for UV-light in the pathogenesis.

Key words: Haemangiosarcoma, Solar elastosis, Vascular tumour, Ocular tumour, Conjunctival tumour


 
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How to Cite this Article
Pubmed Style

Kashani-Carver A, Ohalloran C, Scurrell E, Featherstone H, de-Freitas FF, Lowe R. Equine conjunctival haemangiosarcoma: Clinical presentation, management, and outcome of seven cases in the United Kingdom. Open Vet J. 2023; 13(10): 1366-1378. doi:10.5455/OVJ.2023.v13.i10.17

Web Style

Kashani-Carver A, Ohalloran C, Scurrell E, Featherstone H, de-Freitas FF, Lowe R. Equine conjunctival haemangiosarcoma: Clinical presentation, management, and outcome of seven cases in the United Kingdom. https://www.openveterinaryjournal.com/?mno=162055 [Access: May 02, 2024]. doi:10.5455/OVJ.2023.v13.i10.17

AMA (American Medical Association) Style

Kashani-Carver A, Ohalloran C, Scurrell E, Featherstone H, de-Freitas FF, Lowe R. Equine conjunctival haemangiosarcoma: Clinical presentation, management, and outcome of seven cases in the United Kingdom. Open Vet J. 2023; 13(10): 1366-1378. doi:10.5455/OVJ.2023.v13.i10.17


Vancouver/ICMJE Style

Kashani-Carver A, Ohalloran C, Scurrell E, Featherstone H, de-Freitas FF, Lowe R. Equine conjunctival haemangiosarcoma: Clinical presentation, management, and outcome of seven cases in the United Kingdom. Open Vet J. (2023), [cited May 02, 2024]; 13(10): 1366-1378. doi:10.5455/OVJ.2023.v13.i10.17


Harvard Style

Kashani-Carver, A., Ohalloran, . C., Scurrell, . E., Featherstone, . H., de-Freitas, . F. F. & Lowe, . R. (2023) Equine conjunctival haemangiosarcoma: Clinical presentation, management, and outcome of seven cases in the United Kingdom. Open Vet J, 13 (10), 1366-1378. doi:10.5455/OVJ.2023.v13.i10.17


Turabian Style

Kashani-Carver, Andrea, Conor Ohalloran, Emma Scurrell, Heidi Featherstone, Felipe Ferreira de-Freitas, and Robert Lowe. 2023. Equine conjunctival haemangiosarcoma: Clinical presentation, management, and outcome of seven cases in the United Kingdom. Open Veterinary Journal, 13 (10), 1366-1378. doi:10.5455/OVJ.2023.v13.i10.17


Chicago Style

Kashani-Carver, Andrea, Conor Ohalloran, Emma Scurrell, Heidi Featherstone, Felipe Ferreira de-Freitas, and Robert Lowe. "Equine conjunctival haemangiosarcoma: Clinical presentation, management, and outcome of seven cases in the United Kingdom." Open Veterinary Journal 13 (2023), 1366-1378. doi:10.5455/OVJ.2023.v13.i10.17


MLA (The Modern Language Association) Style

Kashani-Carver, Andrea, Conor Ohalloran, Emma Scurrell, Heidi Featherstone, Felipe Ferreira de-Freitas, and Robert Lowe. "Equine conjunctival haemangiosarcoma: Clinical presentation, management, and outcome of seven cases in the United Kingdom." Open Veterinary Journal 13.10 (2023), 1366-1378. Print. doi:10.5455/OVJ.2023.v13.i10.17


APA (American Psychological Association) Style

Kashani-Carver, A., Ohalloran, . C., Scurrell, . E., Featherstone, . H., de-Freitas, . F. F. & Lowe, . R. (2023) Equine conjunctival haemangiosarcoma: Clinical presentation, management, and outcome of seven cases in the United Kingdom. Open Veterinary Journal, 13 (10), 1366-1378. doi:10.5455/OVJ.2023.v13.i10.17


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