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J Am Vet Med Assoc. 1997 Mar 1;210(5):668-71.

Orbital neuroendocrine tumors in three horses.

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  • 1Department of Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins 80523, USA.

Abstract

Three horses were examined because of exophthalmos and others signs indicative of a space-occupying orbital mass. In 2 horses, exenteration was used to remove the orbital mass. In a third horse, an orbital tumor and lung metastases were found at necropsy. Routine histologic and Grimelius' histochemical staining were used on fixed tissues; immunohistochemical staining for chromogranin and electron microscopy also were performed. Masses were orbital neuroendocrine tumors. Horses that underwent exenteration were alive 19 and 24 months after surgery. Hypotension was encountered at surgery in both horses and may have been a consequence of manipulating the tumor. The orbital neuroendocrine tumors in these horses seem comparable to orbital paragangliomas found rarely in people.

PMID:
9054998
[PubMed - indexed for MEDLINE]
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