New 5th Ed Classification of Tumours books were not released by the World Health Organization in 2023 for review by the NAACCR ICD-O Implementation Task Force. As a result, there will not be an update for 2025. Continue using the current histology coding references found in the Solid Tumor Rules, ICD-O-3.2, ICD-O-3.2 Annotated list, and previous ICD-O guidelines.
Lois Dickie, BA, BS, ODS-C
Public Health Analyst
NCI/SEER
Senior Editor, Solid Tumor Rules
Senior Editor, SEER*RX
Chair, NAACCR ICD-O Implementation Work Group
CTR SME, Cancer PathCHART Project