: The 5th edition (WCT5) organizes tumours into a rigid hierarchy: Site → Category → Family → Type → Subtype .
: Continues to be categorized separately from traditional SCC. 3. New Sections & Provisional Entities WHO Classification of Skin Tumours
: Entities are now generally listed in order from benign to malignant within each section to better reflect their neoplastic progression and clinical aggressiveness. : The 5th edition (WCT5) organizes tumours into
: "Primary cutaneous NUT (Nuclear protein in testis) carcinoma" is included as a new provisional entity. 4. Adnexal & Soft Tissue Tumours New Sections & Provisional Entities : Entities are
: 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).
: Significant updates were made to dendritic cell and histiocytic neoplasms, as well as T-cell and NK-cell disorders.