Comparison of virtual colonoscopy with conventional colonoscopy in detection of colorectal polyps.

Background/aims: To determine the sensitivity and specificity of multidetector computed tomography-based virtual colonoscopy for colorectal polyp detection by using conventional colonoscopy as the reference standard.

Methods: 48 patients with high risk for colorectal cancer underwent virtual colonoscopy followed by conventional colonoscopy. Examination results were compared with conventional colonoscopy, which served as the gold standard.

Gamna-Gandy bodies: a sign of portal hypertension.

Gamna-Gandy bodies (siderotic nodules) represent organized foci of hemorrhage in the spleen that is caused by portal hypertension. Gamna-Gandy bodies contain hemosiderin, fibrous tissue, and calcium. Magnetic resonance imaging has been approved as the most sensitive imaging modality for the detection of these nodules due to their iron content.