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Peer-reviewed veterinary case report

Mitoxantrone instead of doxorubicin for lymphoma treatment in dogs

By Marquardt, Taya M et al.·Published in Journal of the American Veterinary Medical Association·2019·View original on PubMed

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Original publication title: Substitution of mitoxantrone for doxorubicin in a multidrug chemotherapeutic protocol for first-line treatment of dogs with multicentric intermediate- to large-cell lymphoma.

Species:
dog

Plain-English summary

A group of dogs with multicentric lymphoma (a type of cancer) were treated with a chemotherapy protocol that included mitoxantrone instead of doxorubicin, which is sometimes not suitable for certain pets. Out of 44 dogs treated with this new combination, all showed a positive response to the treatment, with a median survival time of about 234 days. While some dogs experienced mild side effects, the overall results were similar to those treated with the traditional chemotherapy. This suggests that mitoxantrone can be a good alternative when doxorubicin isn't an option.

People also search for: dog lymphoma treatment options · mitoxantrone for dogs cancer · side effects of dog chemotherapy

Abstract

OBJECTIVE To evaluate effects of substituting mitoxantrone for doxorubicin in a cyclophosphamide, doxorubicin, vincristine, and prednisone (CHOP) chemotherapeutic protocol for first-line treatment of dogs with multicentric intermediate- to large-cell lymphoma. DESIGN Retrospective cohort study. ANIMALS 44 dogs treated with cyclophosphamide, mitoxantrone, vincristine, and prednisone (CMOP) and 51 dogs treated with CHOP at 12 referral institutions. PROCEDURES Medical records were reviewed to determine response to treatment, progression-free survival time, and overall survival time. For dogs treated with CMOP, adverse events were also recorded. RESULTS All 44 (100%) dogs treated with CMOP and 37 of 38 (97.4%) dogs treated with CHOP had a complete or partial response. Median progression-free survival time for dogs treated with CMOP was 165 days (95% confidence interval [CI], 143 to 187 days), and median overall survival time was 234 days (95% CI, 165 to 303 days). For dogs treated with CHOP, median progression-free survival time was 208 days (95% CI, 122 to 294 days), and median overall survival time was 348 days (95% CI, 287 to 409 days). Progression-free and overall survival times were not significantly different between groups. Overall, 9 of the 44 (20%) dogs treated with CMOP had adverse events likely or probably related to mitoxantrone, but all of these adverse events were mild. CONCLUSIONS AND CLINICAL RELEVANCE Results suggested that mitoxantrone may be a reasonable substitution in a CHOP protocol for treatment of dogs with multicentric intermediate- to large-cell lymphoma when doxorubicin is contraindicated.

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Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/30605381/