WHO classification of skin tumours: key updates in the fifth edition.
Gabrielle Goldman-Lévy, Raymond Barnhill, Boris C Bastian, Werner Kempf, David Elder, Pedram Gerami, Wayne Grayson, Dmitry Kazakov, Daniela Massi, Jane Messina, Arnaud de la Fouchardière, Alexander J Lazar, Thomas Brenn, Brian Rous, Andrew Field
Abstract
Open AccessThe 5th edition of the World Health Organization Classification of Tumours (WCT) serves as a foundation for global diagnostic standards in tumour pathology. Similar to other volumes in this series, the Skin Tumours (Skin5) edition follows a standardized approach. This edition introduces two new chapters: 'Tumours of the nail unit' and 'Metastases to skin', along with new entities across relevant chapters. This review article provides an overview of the updates in Skin5 based on currently published evidence, with emphasis on newly introduced chapters and newly described entities that involve the skin, in particular, epidermal, melanocytic and appendageal tumours.