Equine cutaneous non-neoplastic nodular and proliferative lesions in the Pacific Northwest.

TitleEquine cutaneous non-neoplastic nodular and proliferative lesions in the Pacific Northwest.
Publication TypeJournal Article
Year of Publication2005
AuthorsValentine BA
JournalVeterinary dermatology
Volume16
Issue6
Pagination425-8
Date Published2005 Dec
ISSN0959-4493
KeywordsAge Factors, Animals, Equidae, Female, Horse Diseases, Horses, Male, Northwestern United States, Retrospective Studies, Seasons, Sex Factors, Skin, Skin Diseases, Skin Neoplasms
Abstract

A retrospective study examined data on cutaneous nodular and proliferative lesions in horses, donkeys and mules submitted to the Veterinary Diagnostic Laboratory at Oregon State University in a 3.5-year period. One hundred and sixteen non-neoplastic nodular and proliferative lesions were identified, comprising 18% of all lesions studied and 6.4% of total equine pathology accessions. Exuberant granulation tissue, eosinophilic granuloma, fungal granuloma, cysts and habronaemiasis were most common, and constituted 91% of non-neoplastic lesions, 16% of all lesions studied, and 5.85% of total equine pathology accessions. Calcinosis circumscripta and cutaneous granulomas, including eosinophilic granuloma, fungal granuloma, and other granulomas, were most common in horses up to 10 years of age. Eosinophilic granuloma was more common in males than in females, and was diagnosed most often in autumn and winter. Fungal granuloma was common in this population and was most often diagnosed in the spring. Habronaemiasis was diagnosed in late summer and early autumn, and was most common in males. Results of this study indicate that equine non-neoplastic nodular and proliferative skin lesions are commonly submitted for histopathologic examination. Results also suggest that regional differences exist regarding incidence of cutaneous fungal granuloma and season of occurrence of eosinophilic granuloma in horses.

Alternate JournalVet. Dermatol.