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Rokitansky–Aschoff sinuses
Rokitansky–Aschoff sinuses, also entrapped epithelial crypts, 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. They are usually referred to as adenomyomatosis.
They are not of themselves considered abnormal, but they can be associated with cholecystitis.
==Pathophysiology==
They form as a result of increased pressure in the gallbladder and recurrent damage to the wall of the gallbladder.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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