Veterinary Society of
Surgical Oncology

General Considerations

  • OSA and CSA are the most common pelvic tumors
  • pelvis OSA had a similar biologic behaviour to appendicular OSA
  • diagnosis: survey radiographs and CT to assess presence and degree of sacral involvement


  • 3 classifications of hemipelvectomy: radical, conservative, and internal
  • radical: limb amputation with separation of pelvis through sacroiliac joint
  • conservative: limb amputation with preservation of sacroiliac joint and cranial ilium
  • internal: preservation of limb
  • musculocutaneous flaps are preferred for wound closure although fasciocutaneous flaps acceptable
  • medial extent of the tumor is the most difficult dissection with midline (sacrum or pubis) the surgical limit
  • complications are rare and similar to limb amputation
  • complications in humans include infection, skin flap necrosis, herniation, fecal and urinary incontinence if pudendal nerve roots transected, thromboembolic disease, and local tumor recurrence
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