Figure 1. Papillary Urothelial Neoplasms.

Figure 1

Papillary Urothelial Neoplasms. A, Urothelial papilloma with normal thickness urothelium, no architectural disorder and bland cytology. B, Inverted urothelial papilloma with an endophytic growth pattern with urothelium organized in trabeculae and anastomosing cords. C, Papillary urothelial neoplasm of low malignant potential (PUNLMP) has thickened urothelium, orderly architecture and uniform cytology. D, An inverted form of PUNLMP. E, Low grade non-invasive papillary urothelial carcinoma with long, slender papillae, higher magnification (F) shows mild loss of polarity, mild cytologic pleomorphism and mitoses in the lower half of the urothelium. G and H, High grade non-invasive papillary urothelial carcinoma with complex papillae with and fused architecture. Architectural disorder and nuclear pleomorphism are visible on low power. I, Concurrent low grade and high-grade lesions can be found.

From: Chapter 2, Papillary Urothelial Neoplasms: Clinical, Histologic, and Prognostic Features

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Urologic Cancers [Internet].
Barber N, Ali A, editors.
Brisbane (AU): Exon Publications; 2022 Sep 12.
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