Radiographic and Ultrasonographic Findings of a Segmental Mesenteric and Jejunal Torsion in a Guinea Pig.

A 6-year-old intact male guinea pig was presented for acute abdominal pain, anorexia, and absence of ambulation for 12 h. Radiographs revealed moderate gastric dilation and multifocal marked small intestinal gas dilation. Ultrasonography showed a focally dilated jejunal loop with abrupt narrowing and torsion, with a mesenteric vascular "whirl sign". The aborad jejunum was empty. Surgery revealed a focal mesenteric torsion with associated segmental jejunal torsion and consequent jejunal occlusion. A cardiopulmonary arrest occurred during the surgery. This is the first report of diagnostic imaging findings associated with mesenteric torsion in a guinea pig.