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  • Title: Predictors of outcome in dogs with subcutaneous or intramuscular hemangiosarcoma.
    Author: Shiu KB, Flory AB, Anderson CL, Wypij J, Saba C, Wilson H, Kurzman I, Chun R.
    Journal: J Am Vet Med Assoc; 2011 Feb 15; 238(4):472-9. PubMed ID: 21320017.
    Abstract:
    OBJECTIVE: To identify prognostic factors in a large group of dogs with subcutaneous or intramuscular hemangiosarcoma (HSA) or both. Design-Multi-institutional retrospective cohort study. Animals-71 dogs with subcutaneous or intramuscular HSA. PROCEDURES: Medical records of affected dogs were reviewed. The following factors were evaluated for an association with outcome: dog age and sex, clinical signs, anemia, thrombocytopenia, neutrophilia, tumor stage at diagnosis, achievement of complete excision, intramuscular involvement, presence of gross disease, tumor recurrence, and treatment. RESULTS: Of the 71 cases identified, 16 (29%) had intramuscular tumor involvement. For all dogs, median time to tumor progression and overall survival time (OST) were 116 and 172 days, respectively; 25% survived to 1 year. Univariate analysis identified presence of clinical signs or metastasis at diagnosis, dog age, tumor size, use of any surgery, and presence of gross disease as predictors of time to tumor progression and OST. There was no significant difference in survival time between dogs with respect to type of HSA. Multivariate analysis confirmed that adequate local tumor control, tumor diameter ≤ 4 cm, presence of metastasis at diagnosis, and presence of gross disease were significantly associated with OST. CONCLUSIONS AND CLINICAL RELEVANCE: Subcutaneous and intramuscular HSA remains a heterogeneous group of tumors that generally carries a poor prognosis. Adequate local control of smaller tumors with no associated clinical signs or metastasis may provide the best chance of long-term survival.
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