Truth or Spin? Disease Definition in Cancer Screening

Area of Science:

• Philosophy of Medicine
• Philosophy of Biology
• Medical Ethics

Background:

• The abundance of small, indolent cancers detected through screening raises questions about their classification as normal variations, risk factors, or true diseases.
• Philosophical naturalists in medicine utilize pathophysiological findings to objectively define disease, but these findings can mislead diagnostic reasoning.

Purpose of the Study:

• To analyze the role of pathophysiological findings in disease definition.
• To understand how these findings can lead to errors in diagnostic reasoning.
• To evaluate the objectivity of reductionist approaches in disease definition debates.

Main Methods:

• Analysis of philosophical arguments regarding disease definition.
• Examination of the consistency of reductionist approaches with Bayesian clinical reasoning.
• Critique of appeals to scientific natural kinds in the philosophy of biology.

Main Results:

• Reductionist attempts to define disease objectively are inconsistent with the probabilistic nature of clinical reasoning.
• Appeals to scientific natural kinds in defining disease are inconsistent with current philosophy of biology.
• Even context-specific disease paradigms can distort reasoning in specific clinical cases.

Conclusions:

• Objective disease definition is challenged by the nature of clinical reasoning and scientific understanding.
• Paradigmatic approaches, while useful, require careful application to avoid reasoning distortions.
• Rethinking disease definition requires acknowledging the limitations of reductionism and the nuances of clinical judgment.