“…Small bowel obstruction secondary to bezoar impaction is much less common, with a reported frequency of around 4%, and is rarely diagnosed preoperatively [1][2][3]. Phytobezoar is a type of bezoar comprising an aggregate of indigestible vegetables or fibers in the gastrointestinal tract [1,2,4,5]. Shiitake mushroom is full of insoluble dietary fiber, uneasy to ingest in an uncut form, soft and slimy and can lead to accidental swallowing, especially in an aged person without teeth [6][7][8].…”