HistoryAn 11-year-old spayed female Pug was evaluated because of a 3-week history of hematochezia, tenesmus, and recurrent rectal prolapse. On physical examination, the dog was normothermic and panting and had a heart rate of 150 beats/min. No abnormalities were found on thoracic auscultation or abdominal palpation. Crepitus in both stifle joints and grade 3 medially luxating patellae were detected on physical examination. A mass was palpated per rectum, which originated from the dorsal colon wall at the level of the pelvic inlet. Leukocytosis (45 X 10 3 WBCs/µL; reference range, 4.9 to 13.1 X 10 3 WBCs/µL) was found on CBC determination and consisted of severe neutrophilia (38.23 X 10 3 cells/µL; reference range, 2.45 to 9.17 X 10 3 cells/µL) and mild monocytosis (3.15 X 10 3 cells/µL; reference range, 0.08 to 1.16 X 10 3 cells/µL). Results of serum biochemical analysis and urinalysis were within reference range limits, and oocytes of Trichuris spp were detected on fecal examination. Survey radiographs of the abdomen were obtained (Figure 1).Determine whether additional imaging studies are required, or make your diagnosis from Figure 1-then turn the page →
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