Fig. 9From: Gallbladder adenomyomatosis: imaging findings, tricks and pitfallsGallbladder adenomyomatosis: typical contrast-enhanced ultrasound (CEUS) findings. On CEUS, the thickened gallbladder wall shows discrete contrast enhancement, whereas Rokitansky–Aschoff sinuses (arrows) appear as avascular structures during every phase of the examBack to article page