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Animal Osteosarcoma Treatment Port Orchard WA

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.

Kitsap Veterinary Hospital
(360) 443-7389
3036 Bethel Rd SE
Port Orchard, WA
Hours
Monday 8:30 AM - 6:00 PM
Tuesday 8:30 AM - 6:00 PM
Wednesday 8:30 AM - 6:00 PM
Thursday 8:30 AM - 6:00 PM
Friday 8:30 AM - 6:00 PM
Saturday 8:30 AM - 2:00 PM
Sunday Closed
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Animal Boarding, Animal Flea Control, Animal Microchipping, Small Animal Vet, Spaying/Neutering, Veterinarians, Veterinary Dentistry, Veterinary Surgery

Ridgetop Animal Hospital
(360) 915-5587
1193 Tahoe Lane
Silverdale, WA
Hours
Monday 7:00 AM - 8:00 PM
Tuesday 7:00 AM - 8:00 PM
Wednesday 7:00 AM - 8:00 PM
Thursday 7:30 AM - 8:00 PM
Friday 7:00 AM - 8:00 PM
Saturday 9:00 AM - 5:00 PM
Sunday Closed
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Animal Boarding, Animal Grooming, Small Animal Vet, Veterinarians, Veterinary Dentistry, Veterinary Surgery, Veterinary Vaccinations

VCA West Seattle Veterinary Hospital
(206) 445-7578
5261 California Ave SW
Seattle, WA
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Monday 7:00 AM - 7:00 PM
Tuesday 7:00 AM - 7:00 PM
Wednesday 7:00 AM - 7:00 PM
Thursday 7:00 AM - 7:00 PM
Friday 7:00 AM - 7:00 PM
Saturday 8:00 AM - 5:00 PM
Sunday Closed
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Animal Boarding, Animal Daycare, Animal Flea Control, Animal Microchipping, Small Animal Vet, Spaying/Neutering, Veterinarians, Veterinary Dentistry, Veterinary Euthanasia, Veterinary Medical Specialties, Veterinary Surgery

VCA Central Kitsap Animal Hospital
(360) 633-1819
10310 Central Valley Rd NE
Poulsbo, WA
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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 Flea Control, Animal Grooming, Animal Microchipping, Emergency Veterinary Clinic, Small Animal Vet, Spaying/Neutering, Veterinarians, Veterinary Dentistry, Veterinary Euthanasia, Veterinary Medical Specialties, Veterinary Surgery

VCA Crown Hill Animal Hospital
(206) 420-0041
9069 Holman Rd NW
Seattle, WA
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Monday 7:00 AM - 7:30 PM
Tuesday 7:00 AM - 7:30 PM
Wednesday 7:00 AM - 7:30 PM
Thursday 7:00 AM - 7:30 PM
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Saturday 8:00 AM - 5:00 PM
Sunday 9:00 AM - 5:00 PM
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Wheaton Way Veterinary Hospital
(360) 525-3985
1216 Ivy Rd.
Bremerton, WA
Hours
Monday 7:00 AM - 6:00 PM
Tuesday 7:00 AM - 6:00 PM
Wednesday 7:00 AM - 6:00 PM
Thursday 7:00 AM - 6:00 PM
Friday 7:00 AM - 6:00 PM
Saturday 8:00 AM - 5:00 PM
Sunday Closed
Services
Animal Flea Control, Animal Microchipping, Declawing, Small Animal Vet, Spaying/Neutering, Veterinarians, Veterinary Dentistry, Veterinary Euthanasia, Veterinary Surgery, Veterinary Vaccinations

VCA Olympic Animal Hospital
(360) 865-5079
3422 NW Byron St
Silverdale, WA
Hours
Monday 8:00 AM - 5:30 PM
Tuesday 8:00 AM - 5:30 PM
Wednesday 8:00 AM - 5:30 PM
Thursday 8:00 AM - 5:30 PM
Friday 8:00 AM - 5:30 PM
Saturday 8:00 AM - 5:30 PM
Sunday Closed
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Animal Boarding, Animal Daycare, Animal Flea Control, Animal Grooming, Animal Microchipping, Small Animal Vet, Spaying/Neutering, Veterinarians, Veterinary Dentistry, Veterinary Euthanasia, Veterinary Surgery

VCA Magnolia Animal Hospital
(206) 445-7064
2201 34th Avenue W
Seattle , WA
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Monday 7:00 AM - 7:00 PM
Tuesday 7:00 AM - 7:00 PM
Wednesday 7:00 AM - 7:00 PM
Thursday 7:00 AM - 7:00 PM
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Sunday 9:00 AM - 1:00 PM
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Animal Boarding, Animal Daycare, Animal Flea Control, Animal Grooming, Animal Microchipping, Small Animal Vet, Spaying/Neutering, Veterinarians, Veterinary Dentistry, Veterinary Euthanasia, Veterinary Medical Specialties, Veterinary Surgery

VCA Five Corners Animal Hospital
(206) 552-7938
15707 1st Ave S
Seattle, WA
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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 Grooming, Animal Microchipping, Emergency Veterinary Clinic, Exotic Animal Vet, Large Animal Vet, Reptile Vet, Small Animal Vet, Spaying/Neutering, Veterinarians, Veterinary Dentistry, Veterinary Euthanasia, Veterinary Medical Specialties, Veterinary Surgery

Madison Street Animal Hospital
(206) 452-1885
2215 E Madison Street
Seattle, WA
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Monday 8:00 AM - 7:00 PM
Tuesday 8:00 AM - 7:00 PM
Wednesday 8:00 AM - 7:00 PM
Thursday 8:00 AM - 7:00 PM
Friday 8:00 AM - 7:00 PM
Saturday 9:00 AM - 4:00 PM
Sunday 9:00 AM - 4:00 PM
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Animal Boarding, Animal Daycare, Animal Flea Control, Animal Microchipping, Bird Vet, Emergency Veterinary Clinic, Equine Vet, Exotic Animal Vet, Holistic Veterinary Medicine, Large Animal Vet, Small Animal Vet, Spaying/Neutering, Veterinarians, Veterinary Dentistry, Veterinary Euthanasia, Veterinary House Calls, Veterinary Medical Specialties, Veterinary Surgery, Veterinary Vaccinations

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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