OBJECTIVE To describe signalment, clinicopathologic features, and outcomes of dogs with confirmed primary intestinal lymphoma and assess factors associated with survival times in these patients.
DESIGN Retrospective case series.
ANIMALS 84 client-owned dogs.
PROCEDURES Medical records from 7 veterinary institutions were retrospectively reviewed to identify dogs with primary intestinal lymphoma. Data collected included signalment, clinical signs, anatomic location of tumors, diagnostic procedures, treatment, outcome, and dates of diagnosis and death.
RESULTS Overall median survival time (MST) was 62 days (range, 1 to 537 days). Factors associated with shorter survival time on univariate analysis included anorexia or septic peritonitis at the time of diagnosis and tumor location (intestinal tract only, intestinal tract and abdominal lymph nodes, or intestinal tract and extraintestinal organs). The most commonly noted changes in the intestinal tract were altered wall thickening with loss of layering (41 dogs) and presence of ≥ 1 discrete mass (24 dogs). Protocols based on cyclophosphamide, doxorubicin, vincristine, and prednisone with or without l-asparaginase (48 dogs) or 1-(2-chloroethyl)-3-cyclohexyl-1-nitrosourea (14 dogs) were most commonly used as first-line treatment; the MSTs of dogs receiving these treatments (60 and 144 days, respectively) did not differ significantly.
CONCLUSIONS AND CLINICAL RELEVANCE The MST of dogs with primary intestinal lymphoma was poor, regardless of first-line treatment used. Anorexia and septic peritonitis were associated with poor prognosis.
Objective—To evaluate outcome associated with subcutaneous and intramuscular hemangiosarcomas treated with adjuvant doxorubicin in dogs.
Design—Retrospective case series.
Procedures—Records of dogs with histologically confirmed hemangiosarcoma, no detectable metastasis at initial evaluation, and adequate local tumor control were included. Age, sex, number of treatments, treatment interval, radiation therapy, and concurrent use of cyclophosphamide or deracoxib were evaluated for associations with disease-free interval (DFI) or survival time. Three to 6 cycles of doxorubicin were planned. Disease-free interval was defined as time of definitive surgery to time of local recurrence, metastasis, or both. Survival time was defined as the beginning of the DFI to time of death.
Results—17 tumors were subcutaneous, and 4 were intramuscular. Median age was 9 years. Median weight was 31.1 kg (68.4 lb). Five dogs received adjuvant radiation therapy. Median DFI for subcutaneous tumors was 1,553 days (95% confidence interval [CI], 469 days to not estimable). Median DFI for intramuscular tumors was 265.5 days (95% CI, 123 to 301 days). Median survival time for subcutaneous tumors was 1,189 days (95% CI, 596 days to not estimable). Median survival time for intramuscular tumors was 272.5 days (95% CI, 123 to 355 days). For dogs with subcutaneous tumors, younger age (< 9 years) was associated with longer DFI and survival time. Dogs with subcutaneous tumors that did not receive radiation therapy had longer DFI.
Conclusions and Clinical Relevance—Dogs with subcutaneous hemangiosarcoma had a more favorable outcome, compared with dogs with intramuscular hemangiosarcoma, when treated with adequate local control and adjuvant doxorubicin.