Abstract
A fourteen-year-old Arabian stallion was presented with general weakness and hematochezia. Clinical examination showed tachycardia but the rest of the physical parameters were within normal limits. Transcutaneous abdominal ultrasonography showed distended small intestinal loops with normal motility but increased mural thickness. Gastroscopic examination revealed small focal lesions in the non-glandular part of the stomach around the margo plicatus of the greater curvature, with a score of II/IV Equine Gastric Ulcer Syndrome. Blood analysis revealed anemia, hypoproteinemia and neutrophilia. Treatment was palliative and was determined based on the initial findings. Despite intensive medical treatment, the horse was euthanized due to progressive deterioration of its condition. Post-mortem necropsy and histopathology revealed an adenocarcinoma with osseous metaplasia within the left dorsal colon.
Highlights
Equine intestinal adenocarcinoma (EIAC) has rarely been reported in horses (Jann et al, 2009), but represents the second-most common type of intestinal neoplasia in equids after lymphoma (Taylor et al, 2006), affecting middle-aged to older horses (East and Savage 1998)
The horse was anemic with decreased packed cell volume (PCV), decreased red blood cell (RBC) count; neutrophilia and hypoproteinemia were present (Table 1)
Based on the blood results and the fact that piroplasmosis is endemic in the United Arab Emirates (UAE), a blood sample was collected and polymerase chain reaction was positive for Babesia caballi and negative for Theileria equi
Summary
Equine intestinal adenocarcinoma (EIAC) has rarely been reported in horses (Jann et al, 2009), but represents the second-most common type of intestinal neoplasia in equids after lymphoma (Taylor et al, 2006), affecting middle-aged to older horses (East and Savage 1998). EIAC can be associated with signs of recurrent colic, diarrhea, weight loss, anorexia, anemia and hyperfibrinogenemia (Wright and Edwards, 1984; Harvey-Micay, 1999). Cut surface of an intestinal adenocarcinoma of a fourteen-year-old Arabian stallion attached to the lumen of the left dorsal colon proximal to the pelvic flexure.
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