OBJECTIVE: Smooth muscle fibres are found within the superficial lamina propria of @entity1494 (Muscularis Mucosa). These muscle fibres of muscularis mucosa should be distinguished from the muscularis propria in cases with @entity189 , because the depth of infiltration affects prognosis and therapy modalities. The aim of the present study was to evaluate whether the presence of vascular plexus is a criterion for muscularis mucosa and to distinguish it from muscularis propria in @entity1494 biopsies and transurethral resection specimens. MATERIALS AND METHODS: @entity1710 -Eosin and Masson-Trichrome stained slides of 54 cases with @entity189 were reviewed. RESULTS: In all cases (100%), thick walled vessels were observed within the lamina propria of @entity1494 . Smooth muscle layer of lamina propria was seen in 48 of 54 cases (88.8%), and these smooth muscle fibres were co-existed with thick walled vessels. In invasive @entity189 ; thin smooth muscle fibres and thick walled vessels were seen within the lamina propria in 22 of 24 cases (91.7%). There were two cases (8.3%) including only vessels in small biopsies of invasive @entity189 cases. In cases with non-invasive @entity189 ; muscle fibres of muscularis mucosa and vessels were found within the lamina propia in 26 of 30 cases (86.7%). In this group, muscle fibres were not detected in 4 cases (13.3%). CONCLUSION: Muscularis mucosa can be detected histologically in @entity1494 biopsies and TUR materials. We emphasize that the presence of vascular network is a useful criterion to determine muscularis mucosa of @entity1494 , even in the absence of muscle fibres.

Vascular plexus is a differentation criterion for muscularis mucosa from muscularis propria in small biopsies and transurethral resection materials of XXXX ?

@entity1710 :: ('MESH:D006416', 'Chemical') :: ['Hematoxylin'] @entity189 :: ('MESH:D002277', 'Disease') :: ['urothelial carcinoma'] @entity1494 :: ('MESH:D001745', 'Disease') :: ['urinary bladder']
@entity1494 :: (MESH:D001745,Disease) :: ['urinary bladder']
