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Animal Osteosarcoma Treatment Sterling CO

Muffin, an 8-year-old female Rottie, presents with a two-week history of right front leg lameness. The physical exam is within normal limits except for a firm mass on the distal forearm, which is painful on palpation. You suspect a tumor.

Frisco Animal Hospital
(970) 368-7176
700 N Summit Blvd
Frisco, CO
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Monday 8:00 AM - 5:30 PM
Tuesday 8:00 AM - 5:30 PM
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Saturday 8:00 AM - 12:00 PM
Sunday Closed
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Animal Microchipping, Spaying/Neutering, Veterinarians, Veterinary Dentistry, Veterinary Surgery

St. Michaels Companion Animal Hospital
(970) 987-5307
2914 67th Avenue #102
Greeley, CO
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Monday 8:00 AM - 6:00 PM
Tuesday 8:00 AM - 6:00 PM
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Thursday 8:00 AM - 6:00 PM
Friday 8:00 AM - 6:00 PM
Saturday 8:00 AM - 12:00 AM
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Animal Flea Control, Animal Microchipping, Bird Vet, Declawing, Exotic Animal Vet, Reptile Vet, Small Animal Vet, Spaying/Neutering, Veterinarians, Veterinary Dentistry, Veterinary Euthanasia, Veterinary Surgery, Veterinary Vaccinations

Seven Hills Veterinary Center
(303) 872-5352
18511 E Hampden Ave # 112
Aurora, CO
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Monday 24 Hours
Tuesday 24 Hours
Wednesday 24 Hours
Thursday 24 Hours
Friday 24 Hours
Saturday 24 Hours
Sunday 24 Hours
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24-Hour Vet, Animal Boarding, Animal Flea Control, Animal Microchipping, Bird Vet, Declawing, Emergency Veterinary Clinic, Exotic Animal Vet, Holistic Veterinary Medicine, Reptile Vet, Small Animal Vet, Spaying/Neutering, Veterinarians, Veterinary Dentistry, Veterinary Euthanasia, Veterinary Medical Specialties, Veterinary Surgery

Powell Veterinary Service
(970) 623-7364
25505 Weld County Rd 53
Kersey, CO
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Monday 8:00 AM - 5:30 PM
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Ken Caryl Veterinary Hospital
(720) 441-1972
6699 W. Ken Caryl Avenue
Littleton, CO
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Monday 8:00 AM - 6:00 PM
Tuesday 8:00 AM - 6:00 PM
Wednesday 8:00 AM - 6:00 PM
Thursday Closed
Friday 8:00 AM - 6:00 PM
Saturday 8:00 AM - 12:00 PM
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Animal Daycare, Animal Flea Control, Animal Grooming, Animal Microchipping, Declawing, Exotic Animal Vet, Small Animal Vet, Spaying/Neutering, Veterinarians, Veterinary Dentistry, Veterinary Euthanasia, Veterinary House Calls, Veterinary Surgery, Veterinary Vaccinations

Aurora Animal Hospital
(720) 315-7156
20250 E. Smoky Hill Road
Centennial, CO
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Monday 7:30 AM - 7:00 PM
Tuesday 7:30 AM - 7:00 PM
Wednesday 7:30 AM - 7:00 PM
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Friday 7:30 AM - 6:00 PM
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Animal Flea Control, Animal Microchipping, Declawing, Emergency Veterinary Clinic, Exotic Animal Vet, Holistic Veterinary Medicine, Reptile Vet, Small Animal Vet, Spaying/Neutering, Veterinarians, Veterinary Dentistry, Veterinary Euthanasia, Veterinary Medical Specialties, Veterinary Surgery, Veterinary Vaccinations

VCA Alameda East Veterinary Hospital
(720) 949-7760
9770 East Alameda Ave
Denver, CO
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Monday 24 Hours
Tuesday 24 Hours
Wednesday 24 Hours
Thursday 24 Hours
Friday 24 Hours
Saturday 24 Hours
Sunday 24 Hours
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24-Hour Vet, Animal Boarding, Animal Daycare, Animal Flea Control, Animal Grooming, Animal Microchipping, Emergency Veterinary Clinic, Exotic Animal Vet, Holistic Veterinary Medicine, Reptile Vet, Small Animal Vet, Spaying/Neutering, Veterinarians, Veterinary Dentistry, Veterinary Euthanasia, Veterinary Medical Specialties, Veterinary Surgery, Veterinary Vaccinations

Aurora Hills Animal Hospital
(720) 477-0987
12597 E Mississippi Ave # 300
Aurora, CO
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Monday 7:30 AM - 5:30 PM
Tuesday 7:30 AM - 7:30 PM
Wednesday 7:30 AM - 5:30 PM
Thursday 8:00 AM - 12:00 PM
Friday 7:30 AM - 5:30 PM
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Sunday Closed
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Animal Microchipping, Small Animal Vet, Spaying/Neutering, Veterinarians, Veterinary Dentistry, Veterinary Euthanasia, Veterinary Surgery, Veterinary Vaccinations

Kittredge Animal Clinic
(303) 219-7774
26390 hwy 74
Kittredge, CO
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Monday 8:00 AM - 6:00 PM
Tuesday 8:00 AM - 6:00 PM
Wednesday 8:00 AM - 6:00 PM
Thursday 8:00 AM - 6:00 PM
Friday 8:00 AM - 6:00 PM
Saturday 8:00 AM - 12:00 PM
Sunday Closed
Services
Animal Boarding, Animal Grooming, Animal Microchipping, Declawing, Small Animal Vet, Spaying/Neutering, Veterinarians, Veterinary Dentistry, Veterinary Surgery, Veterinary Vaccinations

ComforVet, LLC Mobile Veterinary House Call Service
(720) 437-9474
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Denver, CO
Hours
Monday 8:30 AM - 5:00 PM
Tuesday 8:30 AM - 5:00 PM
Wednesday 8:30 AM - 5:00 PM
Thursday 8:30 AM - 5:00 PM
Friday 8:30 AM - 5:00 PM
Saturday Closed
Sunday Closed
Services
Animal Flea Control, Animal Microchipping, Small Animal Vet, Veterinarians, Veterinary Euthanasia, Veterinary House Calls

Managing Animals with Osteosarcoma

Muffin, an 8-year-old female Rottie, presents with a two-week history of right front leg lameness. The physical exam is within normal limits except for a firm mass on the distal forearm, which is painful on palpation. You suspect a tumor.

How would you approach this case? What are your rule-outs?

A: A suspicious lesion in the right radius of Muffin, an 8-year-old female Rottie. Photo by Dr. Phil Zeltzman
Radiographs of the distal radius and ulna are the next logical step. They reveal a lytic and proliferative lesion with soft-tissue swelling (see photo A). Malignant long bone tumors include osteosarcoma (about 85 percent of the time), chondrosarcoma (5 percent), fibrosarcoma (5 percent) and hemangiosarcoma (5 percent). There is a small chance of a metastatic lesion. If this were a benign lesion, it could be an osteoma, chondroma or bone cyst. It also could be osteomyelitis from a bacterial or fungal infection.

Euthanasia offered as a sole treatment option is not ethically acceptable and medically recommended in 2010. Primary bone cancer is a treatable condition that requires a thorough work-up before irreversible decisions are made.

A standard work-up should include:

  • CBC and chemistry. An increased alkaline phosphatase may be correlated with a poorer prognosis in cases of osteosarcoma. (See JAVMA, 1998, Vol. 213.)
  • Three views of the thorax, to detect visible metastasis (macro-metastasis).
  • A bone biopsy.
  • Fungal and bacterial cultures of the bone.

The timing of bone biopsy is debatable. If the clinician is convinced that the lesion is consistent with osteosarcoma, or if the client has financial constraints, an open discussion should take place about the pros and cons of performing an amputation without the benefit of a prior biopsy.

If amputation is elected, then a biopsy and cultures should be harvested afterward to confirm the suspicion. This is a huge leap of faith for the client, so it is important to document what was discussed and what the client chose.

How It’s Done

Should a biopsy be preferred first, then the surgery site is shaved, scrubbed and draped. A stab incision is performed in the skin. A hemostat or periosteal elevator is used to approach the bone. Several cores of bone are sampled with a Jamshidi needle (see photo B) or a Michelle trephine.

It is prudent to use the smallest needle possible to decrease the chances of a pathological fracture of the bone. This is why most surgeons prefer Jamshidi needles. They are available from a variety of manufacturers. A 4-inch, 8 to 11 G needle is often used.

The needle and its sharp stylet are placed on the bone and a small indentation is made. The stylet is removed, and cores of bone are harvested using a rotational motion in various directions. The first cortex and the entire medullary cavity are biopsied.

Maintain Bone’s Strength

B: Bone biopsy with a Jamshidi needle in a 4-year-old Labrador with osteo...

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