title: Renal medullary rim sign in 2 adult quarter horses.
abstract: This report describes a renal ultrasonographic abnormality (medullary rim sign), which was identified in 2 separate cases of spontaneously occurring disease associated with chronic and acute overdosage of phenylbutazone therapy. In horses, medullary rim sign has only been documented in neonatal foals experimentally administered large doses of phenylbutazone.
authors.affiliation: Department of Veterinary Clinical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge 70803-8410, USA.
authors.forename: S
authors.initials: S
authors.lastname: Ramirez
authors.forename: T L
authors.initials: TL
authors.lastname: Seahorn
authors.forename: J
authors.initials: J
authors.lastname: Williams
mesh_terms: D000818:Animals; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000633:toxicity*; D006734:Horse Diseases / Q000139:chemically induced* / Q000000981:diagnostic imaging; D006736:Horses; D007674:Kidney Diseases / Q000139:chemically induced / Q000000981:diagnostic imaging / Q000662:veterinary*; D007679:Kidney Medulla / Q000000981:diagnostic imaging*; D008297:Male; D010653:Phenylbutazone / Q000633:toxicity*; D014463:Ultrasonography
chemical_list: D000894:Anti-Inflammatory Agents, Non-Steroidal; D010653:Phenylbutazone