Outcome of a bilateral mastectomy in a Criollo mare with adenocarcinoma - case report

ABSTRACT Mammary neoplasms are rare in horses compared to other species. However, early diagnosis is crucial to ensure adequate treatment and complete recovery. This study presents a detailed case report of a Criollo mare diagnosed with unilateral mammary adenocarcinoma. It emphasizes the importance of a multidisciplinary approach and personalized treatment plans in achieving a successful outcome and ensuring a high quality of life for the mare. Histopathological analysis was vital for confirming the definitive diagnosis. The therapeutic approach involved a total mastectomy, including the removal of inguinal lymph nodes and a safety margin. Because the surgical procedure resulted in a significant skin defect, the treatment strategy incorporated various therapies, such as the use of amniotic membrane, daily cleaning, and the application of crystal sugar, all in combination with appropriate pharmacological therapy. Despite the rarity of this type of neoplasm in horses, this case report highlights the significance of early diagnosis and tailored therapeutic interventions. It also provides valuable insights into the clinical management and treatment of mammary neoplasms in horses.