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Related Experiment Videos

Therapy for Australian cats with lymphosarcoma.

R Malik1, L J Gabor, S F Foster

  • 1Department of Veterinary Clinical Sciences, Faculty of Veterinary Science, The University of Sydney, New South Wales.

Australian Veterinary Journal
|February 12, 2002
PubMed
Summary

Approximately one quarter of cats with lymphosarcoma can be cured with chemotherapy and/or surgery. Younger, FeLV-negative cats with mediastinal lymphosarcoma have a better prognosis. Response to initial chemotherapy predicts long-term survival.

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Area of Science:

  • Veterinary Oncology
  • Feline Medicine
  • Cancer Chemotherapy

Background:

  • Lymphosarcoma is a common cancer in cats.
  • Treatment outcomes vary significantly based on numerous factors.
  • Identifying prognostic indicators is crucial for treatment planning.

Purpose of the Study:

  • To evaluate the efficacy of multi-agent chemotherapy and/or surgery for feline lymphosarcoma.
  • To identify patient and tumor characteristics influencing treatment response.
  • To assess owner satisfaction with chemotherapy outcomes.

Main Methods:

  • Prospective study of 61 cats with naturally-occurring lymphosarcoma.
  • Treatment involved modified multi-agent chemotherapy (l-asparaginase, vincristine, cyclophosphamide, doxorubicin, methotrexate, prednisolone) and/or surgery.

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  • Clinical data, survival times, and owner satisfaction were recorded.

    • Main Results:

    • One cat cured with surgery alone; 60 treated with chemotherapy.
    • 80% complete remission rate with initial induction chemotherapy (l-asparaginase, vincristine, prednisolone); median survival 187 days.
    • Approximately 29% of cats achieving complete remission were cured; long-term survivors more likely to be <4 years old and have T-cell phenotype tumors.

    Conclusions:

    • Around 25% of cats with lymphosarcoma can be cured with combined therapy.
    • FeLV-negative cats under 4 years old have a favorable prognosis.
    • Initial response to induction chemotherapy is a strong predictor of long-term survival and cure.