What's new in dermatopathology 2023: WHO 5th edition updates

Area of Science:

• Dermatology
• Pathology
• Oncology

Background:

• The World Health Organization (WHO) Classification of Skin Tumors is a critical resource for diagnosing and understanding skin neoplasms.
• Previous editions have guided clinical practice and research, but advancements necessitate regular updates.

Purpose of the Study:

• To outline the key changes introduced in the 5th edition of the WHO Classification of Skin Tumors (2022).
• To highlight significant revisions in nomenclature and diagnostic criteria for various skin tumors.
• To emphasize the role of molecular pathogenesis in the updated classification.

Main Methods:

• Review and analysis of the 5th edition WHO Classification of Skin Tumors (2022).
• Comparative analysis of changes from previous editions.
• Focus on molecular advancements impacting tumor classification.

Main Results:

• Introduction of new terminology and revised diagnostic criteria across multiple skin tumor categories.
• Detailed discussion of specific changes within each tumor group.
• Integration of molecular insights into the understanding of skin tumor development and classification.

Conclusions:

• The 5th edition WHO Classification (2022) represents a significant update, incorporating molecular pathology.
• These changes will impact diagnostic accuracy and therapeutic strategies for skin tumors.
• A deeper understanding of molecular pathogenesis is crucial for classifying the diverse landscape of skin tumors.