PMC2825668_01
Contrast enhanced CT-scan of the abdomen (prone position), showing a large bladder mass, protruding the bladder and almost completely filling up the bladder lumen.
CRM2009-818646.001.jpg
PMC2825668_01_CRM2009-818646.001.jpg
fig1
No invasion of the perivesical tissue was noticed (Figure 1). 
(a) Villous adenoma of the bladder with complex branching papillary structures, that are distended due to the presence of the exophytic mass in the lumen. There is no invasion into the underlying bladder wall ' (Hematoxylin Eosin stain, original magnification 50x) Inset: Higher magnification shows that the fibrovascular stalks of the adenoma are lined by pseudostratified mucinous epithelium with only mild degree of anisokaryosis. (Hematoxylin Eosin stain, original magnification 200x), (b) Urachal mucinous adenocarcinoma characterized by small sheets and nests of columnar mucinous cells floating in extracellular mucin. (Hematoxylin Eosin stain, original magnification 50x), (c) The cysts are lined with urachal mucinous adenocarcinoma with invasion in the bladder wall. (Hematoxylin Eosin stain, original magnification 25x), (d) Detail of papillary projections coated with columnar mucinous cells with pseudostratification, nuclear hyperchromasia and crowding, and goblet cells. (Hematoxylin Eosin stain, original magnification 200x).
CRM2009-818646.002.jpg
PMC2825668_01_CRM2009-818646.002.jpg
fig2
Nearby, villous adenoma of the bladder was seen, appearing as complex branching papillary structures lined by a pseudostratified mucinous epithelium. (Figures 2(a)-2(d)).