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Animal Osteosarcoma Treatment Bristol RI

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.

West Shore Animal Clinic
(401) 384-0983
2500 West Shore Road
Warwick, RI
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Animal Flea Control, Animal Microchipping, Bird Vet, Declawing, Exotic Animal Vet, Small Animal Vet, Spaying/Neutering, Veterinarians, Veterinary Dentistry, Veterinary Euthanasia, Veterinary Surgery

VCA Povar Animal Hospital
(401) 484-6066
15 First St
East Providence, RI
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Monday 7:30 AM - 7:00 PM
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VCA Atwood Animal Hospital
(401) 489-7680
342 Atwood Ave
Cranston, RI
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Pateint Care Clinic every Wednesday 1pm to 5pm. All vaccines are half off with full exam.
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Monday 7:00 AM - 8:00 PM
Tuesday 7:00 AM - 8:00 PM
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Tiogue Veterinary Clinic
(401) 206-0944
916 Tiogue Ave
Coventry, RI
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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
Thursday 7:30 AM - 7:00 PM
Friday 7:30 AM - 5:00 PM
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Animal Flea Control, Animal Microchipping, Declawing, Small Animal Vet, Spaying/Neutering, Veterinarians, Veterinary Dentistry, Veterinary Euthanasia, Veterinary Surgery

Warren Animal Hospital
(401) 245-8313
581 Metacom Ave
Warren, RI

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Warwick Animal Hospital
(401) 484-8945
1950 Elmwood Avenue
Warwick, RI
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New Patients Welcome!
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Tuesday 8:00 AM - 9:00 PM
Wednesday 8:00 AM - 9:00 PM
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Saturday 8:00 AM - 4:00 PM
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Animal Boarding, Animal Daycare, Animal Flea Control, Animal Microchipping, Declawing, Emergency Veterinary Clinic, Small Animal Vet, Spaying/Neutering, Veterinarians, Veterinary Dentistry, Veterinary Euthanasia, Veterinary Medical Specialties, Veterinary Surgery

Riverside Animal Hospital
(401) 489-7719
815 Willett Avenue
Riverside, RI
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Thursday 8:00 AM - 8:00 PM
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Saturday 8:00 AM - 1:00 PM
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Animal Boarding, Animal Flea Control, Animal Microchipping, Declawing, Exotic Animal Vet, Reptile Vet, Small Animal Vet, Spaying/Neutering, Veterinarians, Veterinary Dentistry, Veterinary Euthanasia, Veterinary Medical Specialties, Veterinary Surgery

Diamond Hill Animal Clinic
(401) 405-4853
35 Pine Swamp Rd
Cumberland, RI
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Monday 8:00 AM - 7:00 PM
Tuesday 8:00 AM - 7:00 PM
Wednesday 8:00 AM - 6:00 PM
Thursday 8:00 AM - 7:00 PM
Friday 8:00 AM - 5:00 PM
Saturday 8:00 AM - 12:00 PM
Sunday Closed
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Animal Daycare, Animal Flea Control, Animal Microchipping, Declawing, Small Animal Vet, Spaying/Neutering, Veterinarians, Veterinary Dentistry, Veterinary Euthanasia, Veterinary Medical Specialties, Veterinary Surgery, Veterinary Vaccinations

Tiffany Tapp
(401) 885-1163
2740 S. County Trail
East Greenwich, RI
 
Crane, Chris, Dvm - Warren Animal Hospital
(401) 245-8313
581 Metacom Ave
Warren, RI

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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...

Copyright 2009 BowTie Inc.

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