Iran J Vet Surg, Print ISSN: 2008-3033, Online ISSN: 2676-6299

Document Type : Clinical Report


1 Department of Clinical Sciences, Faculty of Veterinary Medicine, Islamic Azad University, Garmsar Branch, Semnan, Iran.

2 Department of Anatomy and Pathology, Faculty of Medicine, Shahed University, Tehran, Iran.

3 Department of Clinical Sciences, Faculty of Veterinary Medicine, Lorestan University, Khorramabad, Iran.

4 Faculty of Veterinary Medicine, Islamic Azad University, Science and Research Branch, Tehran, Iran.


Cancer is an uncontrolled growth of abnormal cells. It is found in animals as well as humans. There are many different types of cancer that are found in animals, symptoms are often similar to those in people. An 8-year-old male donkey was referred to the Veterinary Teaching Hospital and examined for cylinder-like dense mass that was found on the top of the cervical region and extended from the dorsal part of the base of the ears to withers. Radiographic evaluation of the cervical region was demonstrated that the mass was well-demarcated soft tissue opacity in dorsal cervical vertebrae. Ultrasonographic experimentation display a well circumscribe hyperechoic triangular shape mass with fat echogenicity in the sagittal plane without any vascularization. Surgical exploration of the mass indicated fusiform to cylindrical, well-demarcated, and soft tissue in yellow color. The microscopic finding showed that the tumor cells were identical to those in normal fat tissue and massive vacuoles exchange the cytoplasm with peripheralization of the nuclei. Necrosis and inflammation were not observed, while, dystrophic calcification and fibrosis were detected. Based on the aforesaid macro-, microscopic and histopathologic findings, Lipoma was recognized. Nevertheless, no treatment was performed for this case due to the large volume of the mass.


Main Subjects

  1. Fletcher CDM, Unni KK, Mertens F. World health organization classification of tumors. Pathology and genetics of tumors of soft tissue and bone. IARC Press; Lyon. 2002.
  2. Kazemi D, Neshat-Gharamaleki M. Intermuscular lipoma in the pelvic limb of an aged Shih Tzu-Terrier dog. Iranian Journal of Veterinary Surgery. 2021; 16(1): 71-74.
  3. Erkert R, Moll H, Mac Allister C, Confer A, Ritchery J. Infiltrative lipoma in an American Quarter Horse. Equine Veterinary Education. 2007; 19: 380-383.
  4. Flisberg P., Thomas O. Geijer B. Schott U. Epidural lipomatosis and congenital small pinal canal in spinal anesthesia: a case report and review of the literature. Journal of Medical Case Report. 2009; 3: 128.
  5. Klopfleisch R, Van Der Grinton E, Gruber A. Metastatic uterine adenocarcinoma and hepatic lipomatosis in a llama (Lama glama). Journal of Veterinary Diagnostic Investigation. 2009; 21: 280-282.
  6. Prange T, Holcombe SJ. Brown, JA, Dechant J E, Fubini SL, Embertson RM, Peroni J, Rakestraw PC, Hauptman JG. Resection and anastomosis of the descending colon in 43 horses. Veterinary Surg 2010; 39: 748-753.
  7. Hammer EJ, Chope K, Lemire TD, Reef VB. A lipoma of the extensor tendon sheaths in a horse. Veterinary Radiology and Ultrasound. 2002; 43: 63-65.
  8. Rebsamen E, Gygax D, Dennler M, Jud R, Kummer M. External infiltrating lipoma in a two-week-old foal: computed tomographic evaluation for the assessment of the extension and invasiveness of the tumor. Equine Veterinary Education. 2010; 22, 602-607.
  9. Todd A, Nickloes DO, Facos JG. Lipomas clinical presentation. Medscape. 2020.
  10. Mcchesney AE, Stephensic, Snyder S, Ferguson HR. Infiltrative lipoma in dogs. Veterinary Pathology. 1980; 316-322.
  11. Henneke DR, Potter GD, Kreiderjl, Yeates BF. Relationship between condition score, physical measurements and body fat percentage in mares. Equine Veterinary Journal. 1983; 15(4): 371-372.
  12. Valentine Survey of equine cutaneous neoplasia in the Pacific Northwest. Journal of Veterinary Diagnostic Investigation. 2006; 18(1): 123-126.
  13. Mukaratirwa S, Chipunza J, Chitanga S, Chimonyo M, Bhebhe E. Canine cutaneous neoplasms: prevalence and influence of age, sex and site on the presence and potential malignancy of cutaneous neoplasms in dogs from Zimbabwe. Journal of the South African Veterinary Association. 2005; 76(2):59–62.
  14. Salvatore C, Antonio B. Del Vecchio W, Lanza A, Tartaro G, Giuseppe C. Giant infiltrating lipoma of the face: CT and MR imaging findings. American Journal of Neuroradiology. 2003; 24: 283-286.
  15. Mcgavin MD, Zachary JF. Pathologic basis of veterinary disease. Mosby, London, 2007.
  16. Freeman SL, Boswell JC, Smith RK. Use of transrectal ultrasonography to aid diagnosis of small colon strangulation in two horses. Veterinary Record. 2001; 148: 812-813.