图示：囊性输尿管炎。输尿管已剖开可见表面多个小的反光性突起物。通常无临床表现，由长期的慢性炎症引起。移行上皮向下伸入到固有层并形成囊。
This is ureteritis cystica. The ureter has been opened to reveal multiple small glistening "bumps" on the surface. This condition is generally asymptomatic. It results from long-standing chronic inflammation. Nests of transitional epithelium grow downward into the lamina propria and a central cystic space forms.