Computed tomographic findings in two dogs with chronic unilateral parotid duct ectasia

Abstract

Two dogs were evaluated because of a recurrent left-sided facial swelling. In Case 1, computed tomography (CT) demonstrated a tubular fluid-filled mass associated with the left parotid salivary gland and extending to the oral region. On oral examination, no parotid duct papilla was identified, raising the suspicion of an obstruction at the level of the papilla itself, causing secondary ectasia of the duct. Marsupialisation of the duct was performed, but the swelling did not completely reduce. In Case 2, CT revealed a spherical fluid-filled mass, intimately associated with the left parotid gland and extending cranially. On oral examination, an extension from the mass could be followed rostrally to the level of the oral mucosa, caudal to the maxillary fourth premolar, but the papilla was not visible. No surgery was performed. According to our review of literature, this report represents the first description of CT findings for parotid duct ectasia.