General pathology, a branch of pathology, focuses on the study of basic disease processes and mechanisms, including cell and tissue injury, inflammation, and repair, which are common to various diseases. Understand and describe the processes and differences between reversible and irreversible cell injury, including fatty change, pigmentation, pathologic calcification, necrosis, and gangrene, as well as cellular adaptation mechanisms like atrophy, hypertrophy, hyperplasia, metaplasia, and aplasia