S O p e n A c c e s s Veterinary Sciences and Medicine Vet Sci Med Volume 3(1): 2020 1 RESEARCH ARTICLE Non-surgical Treatment of Canine Auricular Hematoma with Intralesional and Systemic Corticosteroids: A Pilot Study Alberto Martin Cordero 1 *, Cecilia Lopez Marquez 1 , Camilo Romero Núñez 2 , Rafael Heredia Cardenas 2 , Galia Sheinberg Waisburd 3 , Ariadna Flores Ortega 4 1 VETDERM, Dermatología Veterinaria Especializada, Guadalajara, Jalisco, Mexico 2 DERMAVET, Dermatología Veterinaria, Ciudad de Mexico, Mexico 3 CVM, Centro Veterinario Mexico, Departamento de dermatologia, Ciudad de Mexico, Mexico 4 Doctorado en Ciencias Agropecuarias y Recursos Naturales. Centro Universitario de la Universidad Autónoma del Estado de Mexico. UAEM, Amecameca, Estado de Mexico. Mexico Abstract Background - Auricular hematomas are fuctuating, fuid-flled infammations of the pinna’s concave surface in dogs. This condition occurs as a result of violent head movement or scratches on the ear due to external otitis. Pharmacological and surgical treatments have been used with varying results. The objective of this study was to evaluate the effect of drainage in canine auricular hematoma with local corticosteroid deposition and the systemic administration of Prednisolone. Methods & Results - Auricular hematoma was drained in ten dogs. Subsequently, they were treated with a single injection of 0.4 ml of Triamcinolone Acetonide 1 (6 mg/ml) into the hematoma cavity, together with oral anti-infammatory Prednisolone 2 (1 mg/kg) for 10 days. The length of the hematoma showed no change between the frst and second visits, but on the third visit, there was a signifcant reduction from 6.92 to 1.17 cm. Similarly, the width of the bruise showed no change from the frst to the second visit, but there was an easily seen reduction on the last visit. Discussion - The height of the hematoma was signifcantly reduced from the frst to the second visit, but there were no subsequent changes. The hematoma’s amount of fuid decreased with each visit. At the end of the study, patients showed a complete recovery from the hematoma, with no fuid present at the last visit. Drainage of the auricular hematoma with local application of Triamcinolone Acetonide and Prednisolone anti-infammatory doses for 10 days appears to be an effective non-surgical treatment for canine auricular hematoma. Key Words - Otohematoma, Canine, Corticosteroids, Triamcinolone Introduction: Auricular hematomas are fuctuating infammations, flled with hemorrhagic fuid that affect the pinna’s concave surface in dogs and cats[1,2], commonly occurring as a result of violent shaking of the head or scratching of the ears[3]. The exact location of the bleeding is unknown, but it is believed to originate in the branches of the large ear arteries and veins in the cartilage layers. Although we still do not fully understand the pathogenesis, the causes of auricular hematoma may include traumatic bleeding[4,5]. Autoimmune diseases in which a group of patients tested positive for antinuclear antibodies and immunoglobulin G (IgG) were found deposited at the dermo- epidermal junction[6]. Another study found no antinuclear antibody (ANA) titers, although biopsies showed evidence of a hypersensitivity reaction, as well as other immunological factors[1]. An association with allergies, hypersensitivity to skin diseases, Otitis Externa and ear mites have also been proposed and observed [1,6,7]. A study conducted at the University of Cambridge in 159 dogs reported that current treatments for auditory bruising used by veterinarians included needle drainage and local corticosteroid deposition (43%), surgery (29%), and needle drainage without corticosteroids (16%). Surgical procedures included a linear incision with single sutures (35%), sutures plus stents (24%) or an S-shaped incision with sutures (23%). The most common reason for selecting a treatment was previous success (76%). Recurrent hematoma was treated more frequently with surgery (67%). The cosmetic results with the medical treatment are excellent and the results of the surgical treatment are good[8]. Although several surgical techniques have been described to resolve ear bruising[9]. Non-surgical treatments still remain as an option to treat and resolve bruising. The intralesional use of Triamcinolone Acetonide (40 mg/ml) for hematoma has been reported in humans and is associated with good short- Correspondence to: Ariadna Flores Ortega, Centro Universitario UAEM- Amecameca, Universidad Autónoma del Estado de México, Amecameca de Juárez Estado de México, México, E-mail: ariadnaforesortega[AT]gmail[DOT]com Received: Dec 21, 2020; Accepted: Dec 22, 2020; Published: Dec 24, 2020