关键词: 犬；皮肤溃烂；腐霉菌病；组织病理学；GMS染色

Abstract: Pythiosis is a rare infectious disease in animals，with few clinical reports available. It poses considerable challenges in diagnosis and demonstrates limited response to therapeutic interventions. This study documents and analyzes a clinical case of pythiosis，including the diagnostic examinations，diagnostic process，and treatment outcomes，with the aim of providing veterinary clinicians with diagnostic insights and practical reference.