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Surgery and doxorubicin in dogs with hemangiosarcoma
G K Ogilvie1, B E Powers, C H Mallinckrodt
1Department of Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins 80523, USA.
Journal of Veterinary Internal Medicine
|November 1, 1996
Summary
Complete surgical removal of hemangiosarcoma in dogs, followed by doxorubicin chemotherapy, significantly improves survival times. Older dogs and those with complete tumor excision showed better outcomes, highlighting surgery
Area of Science:
- Veterinary Oncology
- Canine Cancer Research
- Surgical Oncology
Background:
- Hemangiosarcoma is a common and aggressive cancer in dogs.
- Adjuvant chemotherapy is often used after surgical tumor removal.
- Prognostic factors influencing treatment outcomes require further investigation.
Purpose of the Study:
- To evaluate the efficacy of adjuvant doxorubicin chemotherapy in dogs with hemangiosarcoma.
- To identify prognostic variables affecting disease-free interval (DFI) and survival time (ST).
- To assess the impact of surgical tumor removal on treatment outcomes.
Main Methods:
- Prospective study of 46 dogs with hemangiosarcoma (excluding skin).
- Adjuvant doxorubicin chemotherapy administered post-surgery (30 mg/m2 IV every 3 weeks for 5 treatments).
- Data collected included patient demographics, tumor characteristics, surgical outcome, histological criteria, DFI, and ST.
Main Results:
- Complete surgical excision of tumor was a critical factor for survival (P < .001).
- Dogs with complete tumor removal had significantly longer ST (mean 267 days) compared to incomplete removal (mean 172 days).
- Histological criteria (differentiation, nuclear pleomorphism, mitotic score, grade) and patient age were associated with ST in dogs with complete excision.
Conclusions:
- Complete surgical removal of hemangiosarcoma, followed by adjuvant doxorubicin, appears effective in improving canine survival.
- Surgical outcome and specific histological features are important prognostic indicators.
- Increasing patient age may positively influence surgical success in removing canine hemangiosarcoma.