<unk>  of the gallbladder as seen on ultrasound Non-contrast abdominal ultrasound and contrast-enhanced ultrasound (CEUS) of<unk>  of the gallbladder: a The fundus of the gallbladder wall was thickened and the GB wall was obscure. b The intramural echogenic foci were detected by high frequency transducer. c CEUS—arterial phase (22 s) —heterogeneous hyper-enhancement and wall was intact. d CEUS—venous phase (34 s) the anechoic spaces were more clear. Rokitansky–Aschoff sinuses Rokitansky–Aschoff sinuses are pseudodiverticula or pockets in the wall of the gallbladder. They may be microscopic or macroscopic. Histologically, they are outpouchings of gallbladder mucosa into the gallbladder muscle layer and subserosal tissue as a result of hyperplasia and herniation of epithelial cells through the fibromuscular layer of the gallbladder wall. Rokitansky–Aschoff sinuses are not of themselves considered abnormal but they can be associated with cholecystitis. They form as a result of increased pressure in the gallbladder and recurrent damage to the wall of the gallbladder. Associations Black pigment gallstones can form in Rokitansky–Aschoff sinuses of the gallbladder after the fourth to fifth decades of life in absence of the typical risk factors for bilirubin supersaturation of bile. Hence, they are associated with gallstones (cholelithiasis). Cases of gall bladder cancer have also been reported to arise from Rokitansky–Aschoff sinuses.
Adenomyomatosis
Verrucous carcinoma
Mammoplasia
Adenoma
Stromal tumor
Epithelial-myoepithelial carcinoma
Adenosarcoma
Epithelial dysplasia