Diseases of the musculoskeletal system or connective tissue is a chapter in ICD-11 that includes conditions affecting bones, joints, muscles, tendons, ligaments, and connective tissues that support and enable movement and structural stability. These disorders may arise from degenerative changes, inflammation, autoimmune processes, trauma, infections, congenital abnormalities, or metabolic disturbances, leading to pain, stiffness, weakness, deformity, or reduced mobility.
This chapter covers a broad spectrum of conditions such as arthritis, osteoporosis, inflammatory rheumatic diseases, soft tissue disorders, and systemic connective tissue diseases. Accurate classification supports appropriate diagnosis, treatment planning, and rehabilitation, while also contributing to research, epidemiological analysis, and public health strategies aimed at preventing disability and maintaining musculoskeletal health.