Pathology is a significant component of the medical sciences to understand the nature of the disease and a major field in diagnosis and modern medicine. It incorporates a wide range of medical practices and bioscience research to diagnose disease mostly by analysing cells, tissues and body fluids. Molecular medicine is an emerging area that aims to understand the molecular determinants of disease and health for the prevention, diagnosis and treatment using physical, chemical, biological and medical techniques. It aims to understand how health is maintained and the origins and mechanisms of human diseases. The molecular medicine perspective emphasizes cellular and molecular phenomena and interventions rather than the previous conceptual and observational focus on patients and their organs.