title: Ultrasonographic findings in 50 dogs with retrobulbar disease.
abstract: Records of 50 dogs with signs of retrobulbar disease that had ultrasonography and diagnosis based on results of cytopathology or histopathology were reviewed retrospectively. Abnormalities were identified ultrasonographically in 43 (86%) dogs. Mass effect was identified in 42% of dogs with neoplasia and 30% of dogs with abscess. Ten of 11 (91%) orbital bone lesions were in dogs with retrobulbar neoplasia. A cavitary lesion was recognized ultrasonographically in 75% of dogs with salivary mucocele and 50% of dogs with retrobulbar abscess. Neoplasms occurred predominantly on the ventral or medial aspect of the orbit, or both, which reflects invasion by nasal or sinus neoplasms. Presence of orbital bone lesions or a mass on the medial aspect of the orbit suggests neoplasia; however, other ultrasonographic signs were nonspecific.
authors.affiliation: Department of Small Animal Medicine and Surgery, The Royal Veterinary College, University of London, North Mymms, Hertfordshire, United Kingdom.
authors.forename: D R
authors.initials: DR
authors.lastname: Mason
authors.forename: C R
authors.initials: CR
authors.lastname: Lamb
authors.forename: G J
authors.initials: GJ
authors.lastname: McLellan
mesh_terms: D000818:Animals; D001922:Brain Abscess / Q000000981:diagnostic imaging / Q000662:veterinary; D003937:Diagnosis, Differential; D004283:Dog Diseases / Q000000981:diagnostic imaging*; D004285:Dogs; D005260:Female; D008297:Male; D009078:Mucocele / Q000000981:diagnostic imaging / Q000662:veterinary; D009901:Optic Nerve Diseases / Q000000981:diagnostic imaging / Q000662:veterinary*; D019574:Optic Nerve Neoplasms / Q000000981:diagnostic imaging / Q000662:veterinary; D011996:Records / Q000662:veterinary; D012189:Retrospective Studies; D014463:Ultrasonography