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This is a shortened version of the thirteenth chapter of the ICD-9: Diseases of the Musculoskeletal System and Connective Tissue. It covers ICD codes 710 to 739. The full chapter can be found on pages 395 to 415 of Volume 1, which contains all (sub)categories of the ICD-9. Volume 2 is an alphabetical index of Volume 1.
Osteoarthritis is the most common form of arthritis, affecting about 237 million people or 3.3% of the world's population, as of 2015. [ 4 ] [ 12 ] It becomes more common as people age. [ 1 ] Among those over 60 years old, about 10% of males and 18% of females are affected. [ 2 ]
There are over 100 types of arthritis. [10] [5] [6] The most common forms are osteoarthritis (degenerative joint disease) and rheumatoid arthritis. [7] Osteoarthritis usually occurs with age and affects the fingers, knees, and hips. [7] [11] Rheumatoid arthritis is an autoimmune disorder that often affects the hands and feet. [7]
In those with foot deformity, approximately 60% are in the tarsometatarsal joints (medial joints affected more than lateral), 30% metatarsophalangeal joints, and 10% have ankle disease. Over half of diabetic patients with neuropathic joints can recall some kind of precipitating trauma, usually minor.
Common causes of knock-knee in adults include arthritis of the knee and traumatic injuries. Toe: hallux valgus (from Latin hallux = big toe) – outward deviation of the big toe toward the second toe, resulting in bunion. Wrist: Madelung's deformity – deformity wherein the wrist bones are not formed properly due to a genetic disorder.
Osteoarthritis is a degenerative, or non-inflammatory arthritis. It is the most common type of arthritis, affecting between 19% and 30% of adults above the age of 45. It is caused by a progressive erosion of cartilage which eventually leads to bone damage. It is a polyarthritis, but it usually begins in a single joint.
Hypertrophic osteoarthropathy is a medical condition combining clubbing and periostitis of the small hand joints, especially the distal interphalangeal joints and the metacarpophalangeal joints.
Post-traumatic osteoarthritis is the most common variation of post-traumatic arthritis. [3] Between 20 and 50% [ 4 ] of all osteoarthritis cases are preceded by post-traumatic arthritis. Patients having post-traumatic osteoarthritis are usually younger than osteoarthritis patients without any previous physical injuries.