Diagnostic Imaging of Lipoma in the Retroperitoneum and Pelvic Cavity in a Dog

개의 후복강과 골반강에 발생한 지방종의 진단영상 증례

  • Lee, Nam-Soon (College of Veterinary Medicine, Seoul National University) ;
  • Kim, Jun-Young (College of Veterinary Medicine, Seoul National University) ;
  • Na, Eung-Sic (Grace Animal Hospital) ;
  • Kim, Mi-Eun (College of Veterinary Medicine, Seoul National University) ;
  • Lee, Hye-Yeon (College of Veterinary Medicine, Seoul National University) ;
  • Choi, Mi-Hyun (College of Veterinary Medicine, Seoul National University) ;
  • Kim, Wan-Hee (College of Veterinary Medicine, Seoul National University) ;
  • Kim, Dae-Yong (College of Veterinary Medicine, Seoul National University) ;
  • Choi, Min-Cheol (College of Veterinary Medicine, Seoul National University) ;
  • Yoon, Jung-Hee (College of Veterinary Medicine, Seoul National University)
  • Published : 2010.02.28

Abstract

An 11-year-old, spayed female, weighing 10 kg miniature Schnauzer was admitted for abdominal distension, anorexia, pollakiuria, and constipation. A large, homogeneous fat opacity mass was identified in the retroperitoneum and pelvic cavity on the abdominal survey radiography. The mass displaced the descending colon peripherally and ventrally, and the urinary bladder ventrally. On the abdominal ultrasonographic examination, the mass was uniformly hyperechoic with a coarse internal echo texture and had outer hyperechoic capsule, and it showed homogeneously same attenuation (-180 ~ -110 HU) as adjacent fat on the computed tomography. There was no evidence of invasion into the surrounding structures or organs. Cytological findings from fine needle aspirates were numerous sheets and clusters of adipocytes. The dog showed complete resolution of clinical signs after surgical resection of the mass. The mass was confirmed as simple lipoma through histopathological examination.

11살의 중성화 암컷 miniature Schnauzer 견이 식욕부진, 복부팽만, 빈뇨증상과 변비증상으로 내원하였다. 복부 일반 방사선 검사에서 하나의 큰 균질한 지방 밀도의 종괴가 후복강과 골반강에서 확인되었다. 그 종괴는 내림결장을 변연부와 배쪽으로, 방광을 배쪽으로 변위시켰다. 복부 초음파 검사에서 종괴는 내부의 거친 에코구조와 바깥쪽에 고에코성 막을 갖고 있으며, 컴퓨터단층촬영에서 균질하게 주위 지방과 같은 (-180 ~ -110 HU) 감쇄성을 보였다. 주위 조직으로의 침습의 증거는 없었다. 세침흡인을 통한 세포검사 결과는 많은 층과 군집의 지방세포들이었다. 환자는 수술적으로 종괴를 제거한 후 임상증상이 완전히 해소되었다. 조직병리학적 검사를 통해 그 종괴는 지방종으로 진단되었다.

Keywords

References

  1. Andac N, Baltacioglu F, Cimsit NC, et al. Fat necrosis mimicking liposarcoma in a patient with pelvic limb lipomatosis CT findings. J Clin Imag 2003; 27: 109-111. https://doi.org/10.1016/S0899-7071(02)00519-3
  2. Baez JL, Hendrick MJ, Shofer FS, Goldkamp C, Sorenmo KU. Liposarcomas in dogs: 56 cases (1989-2000). J Am Vet Med Assoc 2004; 224: 887-891. https://doi.org/10.2460/javma.2004.224.887
  3. Bevier DE, Goldschmidt MH. Skin tumors in dogs. Part II. Tumors of the soft (mesenchymal) tissues. Compend Contin Educ Vet 1981; 3: 506-516.
  4. Brooks D, Dunstan R. Tumors of the skin and soft tissues. In: Merck veterinary manual, 8th ed. Philadelphia: National Publishing. 1998: 702.
  5. Clapp K, Rademacher N, Gaschen L. Imaging diagnosis - Intra-abdominal lipoma. Vet Radiol Ultrasound 2009; 50: 644-645. https://doi.org/10.1111/j.1740-8261.2009.01597.x
  6. Fornage B, Tassin GB. Sonographic appearances of superficial soft tissue lipomas. J Clin Ultr 1991; 19: 215-220. https://doi.org/10.1002/jcu.1870190405
  7. Friedman AC, Hartma DS, Sherman J, Lautin EM, Goldman M. Computed tomography of abdominal fatty masses. Radiology 1981; 139:415-429.
  8. Hammond TN, Regan J. Imaging diagnosis - Intra-abdominal necrotic lipoma. Vet Radiol Ultrasound 2008; 49: 365-367. https://doi.org/10.1111/j.1740-8261.2008.00382.x
  9. Ishida H, Naganuma H, Konno K, Sato M, Hamashima Y, Konno S, Watanabe S, Asanuma Y. Retroperitoneal liposacoma: sonographic findings. Abdominal imaging 2000; 25: 554-558. https://doi.org/10.1007/s002610000091
  10. Mattoon JS, Nyland TG. Abdominal fluid, lymph nods, masses, peritoneal cavity, and great vessel thrombosis. In: Small animal diagnostic ultrasound, 2th ed. Philadelphia: WB Saunders. 2002: 82-91.
  11. Mayhew PD, Brockman DJ. Body cavity lipomas in six dogs. J Small Animal Pract 2002; 43: 177-181. https://doi.org/10.1111/j.1748-5827.2002.tb00053.x
  12. McEntee MC, Thrall DE. Computed tomographic imaging of infiltrative lipoma in 22 dogs. Vet Radiol Ultrasound 2001; 42: 221-225. https://doi.org/10.1111/j.1740-8261.2001.tb00928.x
  13. Peterson J, Couto C. Tumors of the skin and subcutaneous tissues. In: Saunders manual of small animal practice, 2th ed. Philadelphia: WB Saunders. 2000: 231-232.
  14. Strafuss AC, Smith JE, Kennedy GA, Dennis SM. Lipomas in dogs. J Am Anim Hosp Assoc 1973; 9: 555-561.
  15. Volta A, Bonazzi M, Gnudi G, Gazzola M, Bertoni G. Ultrasonographic features of canine lipomas. Vet Radiol Ultrasound 2006; 47: 589-591. https://doi.org/10.1111/j.1740-8261.2006.00191.x