Subscribe to VETERINARY PRACTICE NEWS   SUBSCRIBER SERVICES   
VPN Logo   
 Home   About Us   Contact Us
 

Animal Osteosarcoma Treatment Hillsboro OR

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.

Cornell Center Animal Hospital
(503) 924-7664
16155 Northwest Cornell Rd
Beaverton, OR
Hours
Monday 7:30 AM - 6:00 PM
Tuesday 7:30 AM - 6:00 PM
Wednesday 7:30 AM - 6:00 PM
Thursday 7:30 AM - 6:00 PM
Friday 7:30 AM - 6:00 PM
Saturday 8:00 AM - 2:00 PM
Sunday Closed
Services
Animal Boarding, Animal Flea Control, Animal Microchipping, Declawing, Small Animal Vet, Spaying/Neutering, Veterinarians, Veterinary Dentistry, Veterinary Euthanasia, Veterinary Surgery, Veterinary Vaccinations

Sunset Animal Clinic
(503) 924-7683
14740 NW Cornell Road #20
Portland, OR
Hours
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 - 7:00 PM
Saturday 8:00 AM - 2:00 PM
Sunday Closed
Services
Animal Boarding, Animal Flea Control, Animal Grooming, Animal Microchipping, Declawing, Holistic Veterinary Medicine, Small Animal Vet, Spaying/Neutering, Veterinarians, Veterinary Dentistry, Veterinary Euthanasia, Veterinary Medical Specialties, Veterinary Surgery, Veterinary Vaccinations

Beaverton Pet Clinic
(503) 567-7162
11876 SW Beaverton-Hillsdale Hwy
Beaverton, OR
Promotion
Call Beaverton Pet Clinic to schedule an appointment for your pet today!
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 - 12:00 PM
Sunday Closed
Services
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 Docking, Veterinary Euthanasia, Veterinary Medical Specialties, Veterinary Surgery

Tigard Animal Hospital
(503) 575-7409
13599 Southwest Pacific Hwy
Tigard, OR
Hours
Monday 7:30 AM - 6:00 PM
Tuesday 7:30 AM - 6:00 PM
Wednesday 7:30 AM - 6:00 PM
Thursday 7:30 AM - 6:00 PM
Friday 7:30 AM - 6:00 PM
Saturday 7:30 AM - 2:00 PM
Sunday Closed
Services
Animal Boarding, Animal Daycare, Animal Flea Control, Animal Grooming, Animal Microchipping, Declawing, Emergency Veterinary Clinic, Holistic Veterinary Medicine, Small Animal Vet, Spaying/Neutering, Veterinarians, Veterinary Dentistry, Veterinary Euthanasia, Veterinary Surgery, Veterinary Vaccinations

Willowbrook Veterinary Hospital
(503) 567-7123
11545 SW Durham Rd
Tigard, OR
Promotion
1. 20% of M.L.S. Laser Therapy (6 or more treatments)
2. 15% off complete dental prophy (With Pre-An blood sceen)
Hours
Monday 8:00 AM - 5:00 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 9:00 AM - 12:00 PM
Sunday Closed
Services
Animal Boarding, Animal Daycare, Animal Flea Control, Animal Microchipping, Declawing, Small Animal Vet, Spaying/Neutering, Veterinarians, Veterinary Dentistry, Veterinary Euthanasia, Veterinary Medical Specialties, Veterinary Surgery

VCA Rock Creek Animal Hospital
(503) 924-7732
1445 NW 185th Ave
Aloha , OR
Hours
Monday 6:30 AM - 10:00 PM
Tuesday 6:30 AM - 10:00 PM
Wednesday 6:30 AM - 10:00 PM
Thursday 6:30 AM - 10:00 PM
Friday 6:30 AM - 10:00 PM
Saturday 8:30 AM - 10:00 PM
Sunday 8:30 AM - 10:00 PM
Services
Animal Flea Control, Animal Microchipping, Spaying/Neutering, Veterinarians, Veterinary Dentistry, Veterinary Euthanasia, Veterinary Medical Specialties, Veterinary Surgery, Veterinary Vaccinations

West Slope Veterinary Hospital
(503) 437-9320
10350 SW Canyon Rd.
Beaverton, OR
Hours
Monday 8:30 AM - 5:30 PM
Tuesday 8:30 AM - 5:30 PM
Wednesday 8:30 AM - 5:30 PM
Thursday 8:30 AM - 5:30 PM
Friday 8:30 AM - 5:30 PM
Saturday 8:30 AM - 12:00 PM
Sunday Closed
Services
Animal Boarding, Animal Flea Control, Animal Microchipping, Declawing, Small Animal Vet, Spaying/Neutering, Veterinarians, Veterinary Dentistry, Veterinary Euthanasia, Veterinary Surgery, Veterinary Vaccinations

VCA Raleigh Hills Animal Hospital
(503) 967-7367
4905 SW 77th Ave
Portland, OR
Hours
Monday 7:00 AM - 10:00 PM
Tuesday 7:00 AM - 10:00 PM
Wednesday 7:00 AM - 10:00 PM
Thursday 7:00 AM - 10:00 PM
Friday 7:30 AM - 7:00 PM
Saturday 9:00 AM - 7:00 PM
Sunday 9:00 AM - 7:00 PM
Services
Animal Boarding, Animal Daycare, 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

Kindness Family Vet
(503) 836-3304
2835 19th ave
Portland, OR
Hours
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 - 2:00 PM
Sunday Closed
Services
Animal Boarding, Animal Daycare, Animal Flea Control, Animal Grooming, Animal Microchipping, Bird Vet, Declawing, Emergency Veterinary Clinic, Equine Vet, Exotic Animal Vet, Holistic Veterinary Medicine, Large Animal Vet, Reptile Vet, Small Animal Vet, Spaying/Neutering, Veterinarians, Veterinary Dentistry, Veterinary Euthanasia, Veterinary House Calls, Veterinary Medical Specialties, Veterinary Surgery

Pacific Veterinary Hospital
(503) 567-7038
9715 SW Barbur Blvd
Portland, OR
Hours
Monday 7:30 AM - 6:00 PM
Tuesday 7:30 AM - 6:00 PM
Wednesday 7:30 AM - 6:00 PM
Thursday 7:30 AM - 6:00 PM
Friday 7:30 AM - 6:00 PM
Saturday 8:00 AM - 4:00 PM
Sunday 8:00 AM - 4:00 PM
Services
Animal Boarding, Animal Daycare, Animal Flea Control, Animal Microchipping, Declawing, Emergency Veterinary Clinic, Small Animal Vet, Spaying/Neutering, Veterinarians, Veterinary Dentistry, Veterinary Euthanasia, Veterinary House Calls, Veterinary Surgery

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.

Click here to read the rest of this article from Veterinary Practice News