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Click 76 year-old man with gallbladder torsion in a parastomal hernia. Axial unenhanced CT images with oral contrast. Technique: mAs 181, kV 120, axial slice thickness 5 mm, coronal slice thickness 3mm. These show a markedly distended and thick-walled gallbladder with gallstones, intramural and intraluminal gas in a right lower quadrant parastomal hernia. The gallbladder neck is elongated and deformed; however, the twist is not clearly appreciated due to lack of intravenous contrast.

Click 76 year-old man with gallbladder torsion in a parastomal hernia. Coronal reformatted unenhanced CT images with oral contrast. Technique: mAs 181, kV 120, axial slice thickness 5 mm, coronal slice thickness 3mm. These show a markedly distended and thick-walled gallbladder with gallstones, intramural and intraluminal gas in a right lower quadrant parastomal hernia. The gallbladder neck is elongated and deformed; however, the twist is not clearly appreciated due to lack of intravenous contrast.