title: Prevalence of cranial cruciate ligament rupture in a population of dogs with lameness previously attributed to hip dysplasia: 369 cases (1994-2003).
abstract: OBJECTIVE
  To determine the prevalence of cranial cruciate ligament rupture (CCLR) in dogs with lameness previously attributed to canine hip dysplasia (CHD).
  
  
  METHODS
  Retrospective study.
  
  
  METHODS
  369 client-owned dogs.
  
  
  METHODS
  Hospital medical records from 1994 to 2003 were reviewed for dogs in which the referring veterinarian had diagnosed hip dysplasia or hip pain. Dogs were designated as having hind limb lameness because of partial or complete CCLR or CHD.
  
  
  RESULTS
  8% of dogs were sexually intact females, 43% were spayed females, 14% were sexually intact males, and 35% were castrated males. Mean age was 3.8 years (range, 3 months to 15 years). The most common breeds were the Labrador Retriever (21%), German Shepherd Dog (13%), and Golden Retriever (11%). The prevalence of CCLR as the cause of hind limb lameness was 32% (95% confidence interval, 27.2% to 36.8%). The distribution of CCLR among hind limbs was left (29%), right (28%), and bilateral (43%). Of 119 dogs with CCLR, 94% had concurrent radiographic signs of CHD, 92% had stifle joint effusion, and 81% had a cranial drawer sign.
  
  
  CONCLUSIONS
  On the basis of the high prevalence of CCLR in dogs referred for lameness because of CHD, it is important to exclude other sources of stifle joint disease before making recommendations for treatment of CHD.
authors.affiliation: Comparative Orthopedic Research Laboratory, Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Washington State University, Pullman, WA 99164-7710, USA.
authors.forename: Michelle Y
authors.initials: MY
authors.lastname: Powers
authors.forename: Steven A
authors.initials: SA
authors.lastname: Martinez
authors.forename: James D
authors.initials: JD
authors.lastname: Lincoln
authors.forename: Cara J
authors.initials: CJ
authors.lastname: Temple
authors.forename: Arthur
authors.initials: A
authors.lastname: Arnaiz
mesh_terms: D000818:Animals; D000070598:Anterior Cruciate Ligament Injuries; D001947:Breeding; D003937:Diagnosis, Differential; D004283:Dog Diseases / Q000175:diagnosis* / Q000453:epidemiology / Q000473:pathology; D004285:Dogs; D005260:Female; D006614:Hindlimb / Q000293:injuries; D006619:Hip Dysplasia, Canine / Q000175:diagnosis* / Q000453:epidemiology / Q000473:pathology; D007794:Lameness, Animal / Q000175:diagnosis* / Q000209:etiology; D008297:Male; D010003:Osteoarthritis / Q000000981:diagnostic imaging / Q000209:etiology / Q000662:veterinary; D015995:Prevalence; D011859:Radiography; D012189:Retrospective Studies; D012421:Rupture / Q000175:diagnosis / Q000453:epidemiology / Q000473:pathology / Q000662:veterinary; D012737:Sex Factors; D013264:Stifle / Q000293:injuries; D014481:United States / Q000453:epidemiology