label: Acromioclavicular joint arthritis
label_lc: acromioclavicular joint arthritis
description: Degenerative disease of the acromioclavicular (AC) joint that manifests radiographically as Zanca view X-ray of the AC joint showing radiographic evidence of osteoarthritis such as joint space narrowing, subchondral sclerosis, subchondral cysts, and/or osteophyte formation in the AC joint.