Pathology essentially embraces the functional and structural changes observed in diseases. These changes are seen from the molecular level to the effects on the individual patient.
The primary aim of pathology is the identification of the causes and mechanism of the disease. These will eventually lead to successful therapy and disease prevention. Without pathology, the practice of medicine would still be reliant on fiction and assumptions, and consequently be ineffective.
Pathology in clinical practice includes several subspecialties. The subspecialties comprise of histopathology, cytopathology, haematology, microbiology, immunology, chemical pathology, medical genetics and forensic pathology.