Sonographic and computed tomographic features of intestinal mast cell tumors mimicking alimentary lymphoma in 2 dogs

Two shih tzu dogs were referred to our clinic because of hematochezia and vomiting. Abdominal ultrasonography revealed a focal, asymmetric, exophytic small intestinal mass with loss of wall layering and muscular layer thickening of the adjacent intestine. Computed tomography (CT) in both dogs reveal...

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Bibliographic Details
Published in:	Canadian veterinary journal Vol. 65; no. 1; pp. 17 - 24
Main Authors:	Nam, Chaemin, Park, Nohwon, Shin, Mingyu, Lim, Hayoung, Kim, Jaehwan, Eom, Kidong
Format:	Journal Article
Language:	English
Published:	Canada Canadian Veterinary Medical Association 01-01-2024
Subjects:	Animals Dog Diseases - diagnostic imaging Dog Diseases - pathology Dogs Intestinal Neoplasms - pathology Intestinal Neoplasms - veterinary Lymphoma - diagnostic imaging Lymphoma - veterinary Mast Cells - pathology Retrospective Studies Scientific Tomography, X-Ray Computed - veterinary Ultrasonography - veterinary
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Summary:	Two shih tzu dogs were referred to our clinic because of hematochezia and vomiting. Abdominal ultrasonography revealed a focal, asymmetric, exophytic small intestinal mass with loss of wall layering and muscular layer thickening of the adjacent intestine. Computed tomography (CT) in both dogs revealed a focal, asymmetric, homogenously contrast-enhanced exophytic jejunal and duodenal mass with an intact mucosal layer and generalized lymphadenopathy. Metastasis and ulceration were not detected on CT. The initial imaging diagnosis was lymphoma in both dogs; however, histopathological examination revealed the presence of intestinal mast cell tumors (iMCTs). Despite its similarity to alimentary lymphoma, iMCT should be considered a possible diagnosis, based on imaging characteristics, to ensure that proper treatments are selected. This is the first veterinary report describing detailed ultrasonographic and CT characteristics of iMCTs.Key clinical message:This is the first veterinary case report demonstrating sonographic and computed tomographic features of canine iMCT, which can be misdiagnosed as alimentary lymphoma. This report provides another differential diagnosis to consider when determining the appropriate patient treatment direction and histopathological examination.
Bibliography:	0008-5286(20240101)65:1L.17;1-
ISSN:	0008-5286