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Published on: December 1, 2013
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[New WHO classification 2022: urinary bladder cancer].
Nadine Therese Gaisa1, Arndt Hartmann2, Ruth Knüchel-Clarke3
1Institut für Pathologie, Uniklinik RWTH Aachen, Pauwelsstraße 30, 52074, Aachen, Deutschland. ngaisa@ukaachen.de.
Pathologie (Heidelberg, Germany)
|February 24, 2023
Summary
The updated World Health Organization (WHO) classification for urogenital tumors refines tumor classification and grading. It integrates the Paris system and clarifies subtypes, impacting diagnostic accuracy for urothelial neoplasms.
Area of Science:
- Uropathology
- Oncology
- Genitourinary Pathology
Context:
- The World Health Organization (WHO) classification of urogenital tumors has been updated.
- Previous classifications relied heavily on anatomical location.
- There was a need for a more unified and hierarchical approach to classifying these neoplasms.
Purpose:
- To outline the key changes and advancements in the new WHO classification of urogenital tumors.
- To provide a clear taxonomic framework for genitourinary neoplasms.
- To standardize the grading and classification of noninvasive entities.
Summary:
- The new WHO classification shifts towards a hierarchical taxonomic system, moving away from solely anatomical-based categorization.
- It incorporates the Paris system for urinary cytology and clarifies subtypes and special types of neoplasms, aligning with the 5th edition of the WHO blue book.
- Specific chapters are now dedicated to mesenchymal tumors, well-differentiated neuroendocrine tumors, and neuroendocrine carcinomas. Entities like dysplasia and urothelial proliferation of unknown malignant potential (UPUMP) are no longer distinct, with former variants now termed subtypes and aberrant differentiation more precisely defined.
Impact:
- Enhances diagnostic consistency and accuracy in genitourinary pathology.
- Facilitates better communication and understanding among pathologists and clinicians.
- Provides a foundation for improved patient management and treatment strategies for urogenital tumors.
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