background: differentiation between the muscularis mucosae (mm) and muscularispropria (mp) of the bladder remains challenging. objective: to identify mm- and mp-specific antigens that could be of potential value for staging of urothelialcarcinomain a pilot study. method: the expression of 12 protein antigens in 11 human bladder specimens was examined. there were 5 post radical cystectomy specim...

The muscularis mucosae, a type of smooth muscle located between the urothelium and the urinary bladder detrusor, has been described, although its properties and role in bladder function have not been characterized. Here, using mucosal tissue strips isolated from guinea pig urinary bladders, we identified spontaneous phasic contractions (SPCs) that appear to originate in the muscularis mucosae. ...

In the rabbit ileum Clostridium difficile toxin A causes inflammation and mucosal damage via a specific glycoprotein receptor that contains α-d-galactose. In rabbit colon toxin A also causes inflammation, and this is associated with increased myoelectric activity and eicosanoid production. The present in vitro study was undertaken to determine if a toxin A receptor on one or more layers of colo...

This in vitro study tested the hypothesis that muscularis mucosae contractile activity contributes to rabbit colonic mucosal function by mechanisms other than simple mechanical deformation of the epithelium. Experiments were performed by using a technique that allows simultaneous recording of muscle activity and transmucosal potential difference, a measure of epithelial ion transport. ATP, brad...

The movements of the intestinal villi in living animals were first described by Gruby and Delafond (1). Since the appearance of their report in 1843, contributions to this subject have appeared sporadically. Among those dealing to a large extent with the movements of the villi and giving little or no consideration to the activities of larger masses of the muscularis mucosae are contributions by...

Leiomyoma is one of the most commonly observed esophageal submucosal tumors, often appearing as a smooth-surfaced and semicircular protruded lesion. It sometimes grows toward the esophageal lumen and may be pedunculated in rare cases. We encountered a case of a pedunculated esophageal submucosal tumor diagnosed before treatment as a leiomyoma originating in the muscularis mucosae of a 68-year-o...

We have quantified intraepithelial lymphocytes in the same biopsy series (21 healthy controls, 14 untreated coeliacs, 15 treated coeliacs, five non-coeliac patients with an abnormal jejunal mucosa) both as counts/100 epithelial cells and using as reference value a fixed area of muscularis mucosae. As expected, the number of intraepithelial lymphocytes/100 epithelial cells was significantly high...

BACKGROUND The etiology and pathogenesis of hemorrhoids is unclear, although hemorrhoids are a worldwide disease in men and women, with peak prevalence at 45-65 years of age. Hemorrhoidal cushions as the anal venous plexi are normal anatomical structures from infancy. This study attempts to reveal the angiodysplasia and other pathological changes in association with different degrees of symptom...

Colorectal laterally spreading tumors (LSTs), which are classified into granular (LST-G) and nongranular (LST-NG) types, are a good indication for endoscopic treatment. In practice, the nongranular type is more difficult to remove endoscopically than the granular type. It might be assumed that some histological differences exist between these subtypes. The objective of this study was to analyze...