Computed Tomographic Assessment of Experimentally Induced Legg-Calve-Prethes Disease in Dogs

허혈성 대퇴골두 괴사 유발견에서 전산화 단층 영상 평가

  • Bae, Sun-Hee (College of Veterinary Medicine, Kyungpook National University) ;
  • Seong, Yun-Sang (College of Veterinary Medicine, Kyungpook National University) ;
  • Eom, Ki-Dong (College of Veterinary Medicine, Konkuk University) ;
  • Kim, Jae-Hoon (College of Veterinary Medicine, Cheju National University) ;
  • Jang, Kwang-Ho (College of Veterinary Medicine, Kyungpook National University)
  • Published : 2008.02.29

Abstract

This purpose of this study was to describe and compare the radiographic and computed tomographic(CT) appearance of the experimentally induced Legg-Calve-Perthes Disease(LCPD) in dogs. LCPD was experimentally induced at the left femoral head in 7 litters of a dog. The lesions were evaluated with radiography, CT, and contrast CT every week from day 7 to day 70 after operation. Histopathologic examination was performed on 92th day after operation. Every images were evaluated according to the staging system of the osteonecrosis published by Association Research of Circulation Osseous in 1997 and the scoring(0-4). On CT scan, diffuse porotic lesion and focal sclerotic lesion were detected on day 14 and on day 21 after operation, respectively. Subchondral fracture, articular collapse and crescent sign with decreased attenuation were shown on day 28 after operation for the first time and no change of the sign were detected from operation day 9 to day 70 after operation. Focal porotic lesion and irregular radiopacity of femoral head were detected on day $41{\pm}7.48$ and on day $51{\pm}5.29$ after operation respectively on radiographs. In scoring evaluation, 2.00 was scored on day 14 after operation on CT scan, on day 56 after operation on radiographs, respectively This study has shown that CT is more suitable for early diagnosis of LCPB and has superior sensitivity than radiography. Also, CT has been expected to be important for staging and treatment of LCPD.

Keywords

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