A urothelial carcinoma of the urothelium is shown here at low power to reveal the frond-like papillary projections of the tumor above the surface to the left.

• 低倍镜下可见有一尿道上皮来源的泌尿道癌，癌组织的腺体呈乳头状放射性的在表面向左侧生长。