Who Classification Of Skin Tumours May 2026

: A dedicated new section covers epithelial tumours derived specifically from the nail bed.

: Significant updates were made to dendritic cell and histiocytic neoplasms, as well as T-cell and NK-cell disorders. WHO Classification of Skin Tumours

: The MPATH-Dx V2.0 schema is proposed to help clinicians and pathologists communicate risk levels more effectively across four distinct classes. 2. Keratinocytic / Epidermal Tumours : A dedicated new section covers epithelial tumours

: Each tumour entry includes clear "essential" diagnostic features and "desirable" criteria to improve diagnostic reliability worldwide. Major Clinical Updates by Category 1. Melanocytic Neoplasms Melanocytic Neoplasms : This term is now used

: This term is now used for "intermediate" lesions that exhibit borderline biological behavior but have specific molecular signatures (e.g., BAP1 inactivation or WNT pathway alterations).

: Continues to be categorized separately from traditional SCC. 3. New Sections & Provisional Entities