Mapping National Definitions, Classifications, and Policy Approaches to Poor-Prognosis Cancers Across the G7 Cancer...

Area of Science:

• Oncology
• Global Health Policy
• Cancer Research

Background:

• The G7 Cancer Initiative launched in 2023 to improve global cancer control, prioritizing poor-prognosis cancers.
• A lack of standardized definitions and coordinated initiatives hinders effective collaboration among G7 nations.

Purpose of the Study:

• To analyze how G7 Cancer Initiative countries define and classify poor-prognosis cancers.
• To quantify the burden of these cancers and assess national response strategies.
• To identify needs for standardized definitions and coordinated initiatives.

Main Methods:

• Reviewed national cancer plans and conducted an expert email survey.
• Defined poor-prognosis cancers using 5-year net survival (<30%) and mortality-to-incidence ratio (>0.75).
• Utilized CONCORD-3 and Global Cancer Observatory 2022 data for analysis.

Main Results:

• Pancreatic cancer was consistently defined as poor-prognosis; others varied (liver, esophageal, stomach, brain).
• Lung cancer classification differed based on definition. Lung and pancreatic cancers represent a significant cancer mortality share.
• National strategies for poor-prognosis cancers were inconsistent across G7 countries.

Conclusions:

• Standardized definitions and coordinated actions are essential for poor-prognosis cancers.
• The G7 Cancer Initiative should focus on joint programs for early detection, treatment, and policy alignment.
• Strengthening global response requires collaborative efforts in cancer control.