The utility of ultrasonography in the diagnosis of canine gastric neoplasia was evaluated prospectively in a series of six cases subsequently confirmed as having adenocarcinoma by cytological or histological examination or both. Gastric neoplasia was associated with mural thickening with loss of normal wall sonographic layers and decreased or absent local motility. Sonographic findings were consistent with tumor localization obtained by other diagnostic methods employed. Ultrasonographic-guided, percutaneous, fine-needle aspirations biopsies were successful in two of the three cases in which they were performed. Ultrasonography appears useful in the diagnostic of canine gastric neoplasia.

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