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  2. Detrusor muscle - Wikipedia

    en.wikipedia.org/wiki/Detrusor_muscle

    The detrusor muscle, also detrusor urinae muscle, muscularis propria of the urinary bladder and (less precise) muscularis propria, is smooth muscle found in the wall of the bladder. The detrusor muscle remains relaxed to allow the bladder to store urine , and contracts during urination to release urine.

  3. Muscular layer - Wikipedia

    en.wikipedia.org/wiki/Muscular_layer

    The muscular layer (muscular coat, muscular fibers, muscularis propria, muscularis externa) is a region of muscle in many organs in the vertebrate body, adjacent to the submucosa. It is responsible for gut movement such as peristalsis. The Latin, tunica muscularis, may also be used.

  4. Diverticulum - Wikipedia

    en.wikipedia.org/wiki/Diverticulum

    True diverticula involve all layers of the structure, including muscularis propria and adventitia, such as Meckel's diverticulum. [2] True diverticula are typically synonymous with traction diverticula, which describes the mechanism of formation as pulling forces external to the structure.

  5. Gastrointestinal wall - Wikipedia

    en.wikipedia.org/wiki/Gastrointestinal_wall

    Underlying the epithelium is the lamina propria, which contains myofibroblasts, blood vessels, nerves, and several different immune cells, and the muscularis mucosa which is a layer of smooth muscle that aids in the action of continued peristalsis and catastalsis along the gut.

  6. Ménétrier's disease - Wikipedia

    en.wikipedia.org/wiki/Ménétrier's_disease

    Biopsy of the stomach in Ménétrier disease; the substantial pit hyperplasia makes the large rugal folds appear to be covered by myriad polyps resembling hyperplastic polyps. The muscularis propria is the folded structure at the bottom center. Specialty: Gastroenterology

  7. Lamina propria - Wikipedia

    en.wikipedia.org/wiki/Lamina_propria

    The lamina propria may also be rich in vascular networks, lymphatic vessels, elastic fibers, and smooth muscle fascicles from the muscularis mucosae. Afferent and efferent nerve endings can be found in the lamina propria as well. [6] Immune cells as well as lymphoid tissue, including lymphoid nodules and capillaries, may be present.

  8. Adenomyoma - Wikipedia

    en.wikipedia.org/wiki/Adenomyoma

    Gallbladder adenomyomatosis is a benign disease of the gallbladder characterized by hyperplasia of the mucosal epithelium and smooth muscle cells inside the muscularis propria. [ 4 ] [ 5 ] [ 6 ] The excessive proliferation of epithelial cells causes the mucosa to invaginate into the muscular layer lining the gallbladder wall, resulting in ...

  9. Neuroendocrine tumor - Wikipedia

    en.wikipedia.org/wiki/Neuroendocrine_tumor

    Invades the lamina propria or submucosa, and less than or equal to 1 cm in size T2: Invades the muscularis propria, or greater than 1 cm in size T3: Invades through the muscularis propria into subserosal tissue without penetration of overlying serosa T4: Invades visceral peritoneum (serosal) or other organs or adjacent structures