Imaging Features of Solitary Spinal Plasmacytoma in a Dog

개 척추에서 발생한 고립성 형질세포종의 자기공명영상 증례

  • Keh, Seo-Yeon (Haemaru Referral Animal Hospital and Small Animal Medical Research Institute) ;
  • Choi, Mi-Hyun (Haemaru Referral Animal Hospital and Small Animal Medical Research Institute) ;
  • Lee, Nam-Soon (Haemaru Referral Animal Hospital and Small Animal Medical Research Institute) ;
  • Kim, Tae-Hyun (Haemaru Referral Animal Hospital and Small Animal Medical Research Institute) ;
  • Jang, Jae-Young (Haemaru Referral Animal Hospital and Small Animal Medical Research Institute) ;
  • Kim, Hyun-Wook (Haemaru Referral Animal Hospital and Small Animal Medical Research Institute) ;
  • Yoon, Junghee (College of Veterinary Medicine and the Research Institute for Veterinary Science, Seoul National University)
  • 계서연 (해마루 동물병원 및 부속 소동물 임상의학연구소) ;
  • 최미현 (해마루 동물병원 및 부속 소동물 임상의학연구소) ;
  • 이남순 (해마루 동물병원 및 부속 소동물 임상의학연구소) ;
  • 김태현 (해마루 동물병원 및 부속 소동물 임상의학연구소) ;
  • 장재영 (해마루 동물병원 및 부속 소동물 임상의학연구소) ;
  • 김현욱 (해마루 동물병원 및 부속 소동물 임상의학연구소) ;
  • 윤정희 (서울대학교 수의과대학, 서울대학교 수의과학연구소)
  • Accepted : 2014.06.16
  • Published : 2014.06.30

Abstract

A 12-year-old, intact, female Alaskan malamute presented with severe spinal pain and hind limb lameness. On radiographs, a round, demarcated lytic lesion was identified in the central fifth lumbar vertebra. On magnetic resonance imaging (MRI), the lesion involving the spinal cord appeared hypointense on T1 weighted, hyperintense on T2 weighted, heterogeneously enhanced on post-contrast T1 weighted, and hypointense on GE images. A focal, small, ill-defined, lytic lesion was also observed radiographically in the sixth lumbar vertebra, it appeared as a focal hyperintense lesion on T1 weighted, T2 weighted, and GE images and showed focal enhancement on post-contrast T1 weighted images. She was euthanized owing to extreme pain and severe and progressive clinical signs; a plasmacytoma was histopthologically diagnosed. This report presents an unusual type of spinal tumor, plasmacytoma. MRI is a useful modality to evaluate the anatomic location and extension of spinal lesions.

12살령의 암컷 알라스칸 말라뮤트가 후지 파행과 통증으로 내원하였다. 방사선 검사에서 요추 5번 추체 내 방사선 투과성 병변이 확인되었다. MR 영상에서 요추 5번 추체에서 T1 저신호, T2 고신호, GE 저신호 및 조영 후 T1 영상에서 이질적인 조영 증가 병변이 확인되었고, 병변은 척수까지 침입하여 척수 실질을 심하게 압박하고 있었다. 요추 6번 추체 내에서도 국소적인 방사선 투과성 병변이 확인되었으며, MR 영상에서 T1, T2 및 GE 고신호 및 조영 후 국소적인 조영 증가 병변이 관찰되었다. 심한 통증으로 안락사 후, 생검을 통해 형질세포종이 진단되었다. 척수 질환 환자에서 종양은 반드시 고려되어야 하며 영상 검사가 병변의 위치와 범위를 평가하는데 도움이 된다. 이 증례는 개 척추에서 발생한 고립성 형질세포종의 영상에 대한 유용한 정보를 제공할 것이라 생각한다.

Keywords

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