title: Abdominal Ultrasound Examination Findings in 534 Hyperthyroid Cats Referred for Radioiodine Treatment Between 2007-2010.
abstract: BACKGROUND
  The prevalence of concurrent disease in hyperthyroid cats is unknown.
  
  
  OBJECTIVE
  To identify the prevalence of concurrent intra-abdominal disease using abdominal ultrasound examination (AUS) in hyperthyroid cats referred for radioactive iodine treatment (RIT) and to determine whether the requirement for pretreatment AUS is justified.
  
  
  METHODS
  Five hundred and thirty-four client-owned cats diagnosed with hyperthyroidism and referred for RIT.
  
  
  METHODS
  Retrospective study. Age, breed, sex, body weight, clinical signs, total serum T4 concentration, blood urea nitrogen (BUN) concentration, serum creatinine concentration, urine specific gravity (USG), AUS results, and biopsy or cytology results, or both (if obtained) were collected from the medical records.
  
  
  RESULTS
  The prevalence of concurrent disease identified using AUS in hyperthyroid cats referred for RIT was 36.1%; 22.8% of the cats in the study had renal disease and 2.4% had confirmed neoplasia. Significant differences in median USG (P value 0.032) and median BUN (P value 0.028) were found between cats that had abnormal kidneys on AUS compared to those with normal-appearing kidneys. Only 2.2% of the cats were not treated with RIT as a result of changes identified on AUS and subsequently obtained cytology or biopsy results.
  
  
  CONCLUSIONS
  The results indicate that pretreatment AUS in hyperthyroid cats referred for RIT is unnecessary in most patients.
authors.affiliation: Garden State Veterinary Specialists, Tinton Falls, NJ.
authors.forename: L K
authors.initials: LK
authors.lastname: Nussbaum
authors.affiliation: Garden State Veterinary Specialists, Tinton Falls, NJ.
authors.forename: T D
authors.initials: TD
authors.lastname: Scavelli
authors.affiliation: Cornell University, Ithaca, NY.
authors.forename: D M
authors.initials: DM
authors.lastname: Scavelli
authors.affiliation: Garden State Veterinary Specialists, Tinton Falls, NJ.
authors.forename: J
authors.initials: J
authors.lastname: Pintar
authors.affiliation: Garden State Veterinary Specialists, Tinton Falls, NJ.
authors.forename: A K
authors.initials: AK
authors.lastname: Henderson
authors.affiliation: Garden State Veterinary Specialists, Tinton Falls, NJ.
authors.forename: J A
authors.initials: JA
authors.lastname: DeMarco
authors.affiliation: Garden State Veterinary Specialists, Tinton Falls, NJ.
authors.forename: S
authors.initials: S
authors.lastname: Worwag
authors.affiliation: Monmouth University, West Long Branch, NJ.
authors.forename: R P
authors.initials: RP
authors.lastname: Bastian
authors.affiliation: Monmouth University, West Long Branch, NJ.
authors.forename: H S
authors.initials: HS
authors.lastname: Kittner
mesh_terms: D000005:Abdomen / Q000000981:diagnostic imaging; D000818:Animals; D002371:Cat Diseases / Q000000981:diagnostic imaging* / Q000532:radiotherapy; D002415:Cats; D005260:Female; D006980:Hyperthyroidism / Q000150:complications / Q000000981:diagnostic imaging / Q000532:radiotherapy / Q000662:veterinary*; D007457:Iodine Radioisotopes / Q000627:therapeutic use*; D007674:Kidney Diseases / Q000150:complications / Q000000981:diagnostic imaging / Q000662:veterinary; D008297:Male; D012189:Retrospective Studies; D014463:Ultrasonography
chemical_list: D007457:Iodine Radioisotopes
keywords: Abdominal Ultrasonography; Endocrinology; Feline; Radiology and Diagnostic Imaging