Immunohistochemical Diagnosis of Primary Renal Hemangiosarcoma in a Dog

개에서 발생한 신장원성 혈관육종의 면역조직화학적 진단

  • Jung, Soo-Kyo (College of Veterinary Medicine and Veterinary Medical Research Institute, Jeju National University) ;
  • Yang, Hyoung-Seok (Jeju Self-Governing Provincial Veterinary Research Institute) ;
  • Kim, Jae-Hoon (College of Veterinary Medicine and Veterinary Medical Research Institute, Jeju National University)
  • 정수교 (제주대학교 수의과대학, 수의과학연구소) ;
  • 양형석 (제주특별자치도 동물위생시험소) ;
  • 김재훈 (제주대학교 수의과대학, 수의과학연구소)
  • Accepted : 2013.07.04
  • Published : 2013.08.31

Abstract

A 7-year-old castrated male Yorkshire Terrier was presented with a palpable intra-abdominal mass. In radiography, a large radioopaque renal mass and small abdominal mass were found on dorsal area of the abdomen. Grossly, red to brown color mass and a cystic structure (hydronephrosis) were embedded in the right kidney. Histopathologically, the mass had many irregular shaped neovascular channels lined by polygonal or oval shaped endothelial cells. These vessels and neoplastic cells had great invasive tendency to adjacent connective or fat tissues. Small abdominal mass had identical morphologic features as in renal mass. According to immunohistochemistry, the neoplastic cells in renal mass demonstrated strong positive signals for vimentin and CD31, and weak positive for von Willbrand factor. However, there were no positive reactions for cytokeratin. Based on the gross, histopathology and immunohistochemistry, this mass was diagnosed as primary renal hemangiosarcoma in a Yorkshire Terrier dog.

7년령의 중성화된 수컷 Yorkshire Terrier가 복강에 종괴가 촉진되어 이를 주증으로 내원하였다. 방사선 검사 상 복강의 등쪽면에 신장 종괴와 작은 복강 종괴가 관찰되었다. 수술적으로 적출된 우측 신장에서는, 육안적으로 붉은 갈색조를 띄는 종괴와 낭상 구조가 함께 관찰되었다. 병리조직검사 상에서 다각형 또는 타원형의 내피세포를 가진 다수의 불규칙한 모양의 신생혈관이 관찰되었으며, 이 혈관들과 종양세포들은 주변조직으로의 강한 침습성을 보였다. 복강의 또 다른 작은 종괴에서는 신장 종괴와 동일한 병리조직학적 소견을 관찰할 수 있었다. 면역조직화학염색을 실시한 결과 종양세포들은 vimentin, CD31 및 von Willbrand factor에 대해 양성 반응을 보였으나, cytokeratin에 대해서는 음성 반응을 보였다. 육안적인 특징, 병리조직학적 소견 및 면역조직화학적 검사를 바탕으로 본 증례는 신장원성 혈관육종으로 진단하였다.

Keywords

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