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Histologically, the red foci were limited to the vaginal tunic and consisted of disorderly growing, variably sized, thin-walled blood vessels lined by a single layer of endothelial cells without mitoses and supported by a thin layer of pericytes. The blood vessels were distended by erythrocytes without thrombus formation. Endothelial cells had cytoplasmic immunolabeling for CD31; pericytes had strong cytoplasmic immunolabeling for \u03b1\u2013smooth muscle actin. Our case of subclinical unilateral vascular hamartomas of the vaginal tunic in a dog has not been reported previously in domestic animals or humans, to our knowledge.<\/jats:p>","DOI":"10.1177\/10406387231184841","type":"journal-article","created":{"date-parts":[[2023,7,3]],"date-time":"2023-07-03T05:34:49Z","timestamp":1688362489000},"page":"568-572","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":0,"title":["Unilateral vascular hamartomas of the vaginal tunic in a dog"],"prefix":"10.1177","volume":"35","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0744-3774","authenticated-orcid":false,"given":"Daniel Felipe","family":"Barrantes Murillo","sequence":"first","affiliation":[{"name":"Department of Pathobiology, College of Veterinary Medicine, Auburn University, Auburn, AL, 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