Histopathological Study of Canine Skin Hemangiomas and Hemangiosarcomas in Uruguay

We performed an histological study on all cases of canine skin hemangiomas and hemangiosarcomas that were examined between 2018 and 2020. Of the 446 dogs with skin tumors examined, 25 were diagnosed with hemangiomas and 24 were diagnosed with hemangiosarcomas. Mixed-breed dogs were the most commonly affected by both tumors. The average ages of the dogs who were diagnosed with hemangiomas and hemangiosarcomas were 8.70 and 8.36 years, respectively, with the mean age for hemangiosarcomas being slightly higher; however, this difference was not statistically significant. Both types of tumors were more common in the trunk and limbs. Sex differences in tumor frequency were not detected in dogs with hemangiomas or hemangiosarcomas. Histologically, the mixed capillary and cavernous type was the most common in cases of hemangiomas, and the mixed capillary, cavernous, and solid type and the mixed cavernous and solid type were more common in hemangiosarcoma cases compared with the other types. In addition, epithelioid hemangiosarcomas were frequently detected.