The "Pathologic Basis of Disease" refers to the underlying mechanisms and processes that lead to the development of diseases. It encompasses the study of cellular and tissue changes that occur due to various factors, including infections, genetic mutations, and environmental influences. Understanding these changes helps in diagnosing and treating diseases effectively. This field combines knowledge from various disciplines, such as anatomy, physiology, and biochemistry, to explain how normal biological functions are disrupted. By examining the molecular and cellular alterations associated with diseases, healthcare professionals can develop targeted therapies and improve patient outcomes.