Essentials of Surgical Pathology: Foundations of Disease Mechanisms is a comprehensive and accessible text designed to provide a clear understanding of the principles that underpin surgical pathology. The book serves as an essential resource for medical students, pathology residents, and practicing clinicians seeking a foundational grasp of how structural changes in tissues relate to disease processes. It explores the discipline of surgical pathology as both a diagnostic tool and a scientific endeavour, emphasizing its central role in the detection, classification, and management of disease. Through a blend of clinical relevance and detailed scientific explanation, the book bridges the gap between the microscopic world of cellular alterations and the macroscopic reality of clinical symptoms and treatment decisions. At its core, the book introduces the reader to the key concepts of disease mechanisms, including inflammation, neoplasia, infection, degeneration, and immune-mediated processes, all through the lens of surgical pathology. Each chapter is structured to explain how pathological changes evolve from normal tissue architecture, highlighting the sequence of cellular events that define disease progression. With a strong focus on clinicopathological correlation, the text demonstrates how information obtained from tissue specimens is synthesized into meaningful diagnoses that influence patient care. The book also incorporates modern advances in molecular diagnostics and immunohistochemistry, showing how these tools enhance the precision and depth of pathological analysis in contemporary practice.