<prompt> Which of the following condition is associated with focal and diffuse thickening of gall bladder wall with high amplitude reflections and comet tail aifacts on USG?CholesterolosisAdenomyomatosisCarcinoma of gall bladderXanthogranulomatous cholecysitis  <response>: Focal diffuse thickening of gall bladder wall with high amplitude reflections and comet tail aifacts on USG suggest the diagnosis of adenomyomatosis. Adenomyomatosis is a benign condition characterized by slow growth, enlarged gall bladder wall and hyperplasia of the gall bladder mucosa forming invaginations through the muscular layers, well known as Rokintansky-Aschoff sinuses which causes the comet tail tail aifact in the USG. It may produce focal, segmental or diffuse mural thickening. Ref: Diseases Of The Gallbladder And Bile Ducts:Diagnosis and Treatment By Pierre Alain Clavien, John Baillie, Page 110; Differential Diagnosis in Ultrasound : A Teaching Atlas By Guenter Schmidt, Page 125 