Surgical pathology is a branch of medical science that deals with the diagnosis of diseases through the analysis of tissues and cells obtained through surgery or biopsy. Synonyms for surgical pathology are diagnostic pathology, histopathology, anatomical pathology, and surgical pathology diagnosis. Diagnostic pathology is the study of the histological, cytological, and molecular changes that happen in the body during disease development. Histopathology is the microscopic examination of tissue specimens to diagnose and study the progression of diseases. Anatomical pathology involves the study of human organs and tissues to help in diagnosis, prognosis, and treatment of diseases. Surgical pathology diagnosis is the study of surgically extracted tissue and cells to diagnose diseases and guide treatment.