Villous Adenoma of the Sigmoid Colon
To see the fine structure of the surface anatomy of this beautiful 4x2.5x1.9-cm villous adenoma, choose the "All Sizes" tab, then "Original Size".
After fixing the opened and pinned-out colon resection specimen overnight in formalin, I covered it with reagent alcohol to shoot the photograph. Tissue sinks in alcohol, so you don't have to pin it down to the bottom of the container to keep it from floating to the surface. Also, it may be my imagination, but it seems to me that alcohol is a clearer medium that water.
The entire lesion was processed and examined microscopically. It consisted entirely of non-invasive adenoma with a predominantly villous architecture. Severe dysplasia was limited to a 0.3-cm focus near the apical aspect of the mass.
Villous Adenoma of the Sigmoid Colon
To see the fine structure of the surface anatomy of this beautiful 4x2.5x1.9-cm villous adenoma, choose the "All Sizes" tab, then "Original Size".
After fixing the opened and pinned-out colon resection specimen overnight in formalin, I covered it with reagent alcohol to shoot the photograph. Tissue sinks in alcohol, so you don't have to pin it down to the bottom of the container to keep it from floating to the surface. Also, it may be my imagination, but it seems to me that alcohol is a clearer medium that water.
The entire lesion was processed and examined microscopically. It consisted entirely of non-invasive adenoma with a predominantly villous architecture. Severe dysplasia was limited to a 0.3-cm focus near the apical aspect of the mass.