Musculoskeletal system and connective tissue (M00-M99).
- Bursitis (inflammation of the bursa) in the shoulder region.
- Chronic adhesive capsulitis (capsulitis).
- Chronic polyarthritis – chronic inflammatory multisystem disease, usually manifested in the form of synovitis (inflammation of the synovial membrane).
- Impingement syndrome (English “collision”) – the symptomatology of this syndrome is based on the presence of a constriction of the tendon structure in the shoulder joint and thus a functional impairment of joint mobility. It is mostly caused by degeneration or entrapment of capsular or tendon material. Degeneration or injury of the rotator cuff is the most common cause here. Symptom: Affected patients can barely lift their arm above shoulder height due to the increasing impingement of the supraspinatus tendon. The actual impingement occurs subacromially, which is why this is called subacromial syndrome (short: SAS).
- Incisura-scapulae syndrome (synonym: subacromial tightness syndrome) – refers to the compression of the suprascapular nerve; as a result, a reduction in strength and atrophy of the supraspinatus muscle and infraspinatus muscle often occur.
- Milwaukee shoulder (synonym: idiopathic shoulder joint arthritis) – mild shoulder pain and joint effusion (also with knee joint effusion in about 50% of cases) occurring predominantly in older women (80% of cases) due to deposition of apatite crystals (apatite arthropathy)
- Shoulder joint infection
- Tendinosis calcarea of the shoulder (calcific shoulder) – calcification mostly in the area of the attachment tendon of the supraspinatus muscle; prevalence: about 10% in asymptomatic patients/about 50% becomes symptomatic; often spontaneously regressive (regressing); more men than women; incidence of bilateral: 8-40%.
