Weird StatsTake these canine osteosarcoma prognosis stats with a grain of salt. They are based strictly on conventional treatments. Your dog may not fit into these averages, and especially not if you have added in any of the immune building supplements, enzyme therapy, dietary and lifestyle changes outlined on this site. Moreover, the statistics sited are averages for dogs that were included in small studies.

Poor prognostic indicators include:

  • Animals under seven years of age
  • Large tumor volume
  • Tumor located in the long bone of the fore leg (proximal humerus)
  • Elevated alkaline phosphatase (total and bone specific) levels
  • Failure of elevated alkaline phosphatase levels to return to normal by 40 days post-operative
  • High tumor grade
  • Presence of metastasis

Survival times vary greatly after even conventional treatments. Seven months was reported for dogs receiving radiation treatment plus chemotherapy. More encouraging survival rates have been reported with dogs receiving surgery (amputation or limb sparing) plus chemotherapy. Survival rates were in the neighborhood of 235-366 days and up to 28% surviving two year after diagnosis.

Anatomic site is also prognostic in that appendicular osteosarcoma (radius, ulna, humerus, femur and tibia) is associated with a median survival time of 1 year when treated with aggressive surgery and chemotherapy. Tumors of the mandible and scapula have a slightly better prognosis with a median survival time of about 15–18 months. Tumors of the spine and skull have a poorer prognosis because of anatomic limitations on aggressive surgical resection.

Extraskeletal osteosarcoma has a disheartening prognosis with a median survival time of 73 days.

Without any treatment, dogs diagnosed with osteosarcoma are given a time frame of one to five months, depending on whose stats you are looking at, before they succumb to their cancer.

Amputation with no other treatment can anticipate an average survival of about five months. However, 10% of the dogs do survive up to a year, and with the removal of the limb, the pain is eliminated, increasing the dog’s quality of life.

Since metastasis in the prime concern for long-term survival, adding chemotherapy drug Cisplatin into mix has been found to extend the one year survival to 50%. Treatment with Doxorubicin or Carboplatin also increase the average survival projections, but to a lesser extent.  Canine osteosarcoma prognosis by two years sees 10-20% of the dogs who have received chemotherapy appearing to be free of cancer.

Filed under: Canine Osteosarcoma Prognosis

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