The IARC Monographs: Updated Procedures for Modern and Transparent Evidence Synthesis in Cancer Hazard...

Area of Science:

• Oncology
• Carcinogenesis
• Public Health

Background:

• The International Agency for Research on Cancer (IARC) Monographs program rigorously evaluates carcinogenic hazards.
• The Preamble to the IARC Monographs details the scientific review and evaluation procedures.
• The Preamble was last amended 12 years ago, necessitating an update to incorporate recent scientific and procedural advances.

Purpose of the Study:

• To present the key features of the updated 2019 Preamble to the IARC Monographs.
• To formalize and strengthen the process for identifying, reviewing, evaluating, and integrating evidence on carcinogenic hazards.
• To enhance the transparency and rigor of cancer hazard identification for effective cancer prevention.

Main Methods:

• Strengthening of systematic review methodologies for evidence appraisal.
• Increased emphasis on mechanistic evidence, focusing on key characteristics of carcinogens.
• Enhanced critical evaluation of epidemiological studies, including exposure assessment quality and informativeness.

Main Results:

• Improved harmonization of evaluation criteria across different evidence streams (human, animal, mechanistic).
• Implementation of a single-step process for integrating diverse evidence to reach overall evaluations.
• Formalization of pioneering developments within the Monographs program into a clarified and strengthened process.

Conclusions:

• The updated Preamble establishes a more robust and transparent method for identifying carcinogenic hazards.
• These advancements support the essential first step in cancer prevention by improving hazard identification.
• The revised procedures ensure the IARC Monographs program remains at the forefront of scientific evaluation of cancer risks.