Steroids
Therapeutic injections of corticosteroid and local anaesthetic may be used for persistent impingement syndrome. The total number of injections is generally limited to three due to possible side effects from the corticosteroid. A 2017 review found corticosteroid injections only give small and transient pain relief. Surgery
A number of surgical interventions are available, depending on the nature and location of the pathology. Surgery may be done arthroscopically or as open surgery. The impinging structures may be removed in surgery, and the subacromial space may be widened by resection of the distal clavicle and excision of osteophytes on the under-surface of the acromioclavicular joint. Damaged rotator cuff muscles can be surgically repaired. A 2019 review found that the evidence does not support decompression surgery in those with more than 3 months of shoulder pain without a history of trauma. A recent metaanalysis has further supported that early SIS would likely benefit from non-operative treatment modalities and surgical open decompression should be considered only with chronic presentation. History
Impingement syndrome was reported in 1852. Impingement of the shoulder was previously thought to be precipitated by shoulder abduction and surgical intervention focused on lateral or total acromionectomy. In 1972, Charles Neer proposed that impingement was due to the anterior third of the acromion and the coracoacromial ligament and suggested surgery should be focused on these areas. The role of anteriorinferior aspect of the acromion in impingement syndrome and excision of parts of the anteriorinferior acromion has become a pivotal part of the surgical treatment of the syndrome.
"Fountains syndrome: mental retardation, sensorineural deafness, skeletal abnormalities, and coarse face with full lips". J Med Genet. 26 (11): 722–724. doi:10.1136/jmg.26.11.722. PMC 1015742. PMID 2585470. Fryns JP, Dereymaeker A, Hoefnagels M, Van den Berghe H (1987). "Mental retardation, deafness, skeletal abnormalities, and coarse face with full lips: confirmation of the Fountain syndrome". Am J Med Genet. 26 (3): 551–555. doi:10.1002/ajmg.1320260307. PMID 3565469. Dunkle Mary (1996). "Fountain Syndrome". NORD. Retrieved 26 April 2012. "Fountain syndrome". Ailments.com. 2000. Retrieved 29 April 2012. "Childrens Health:Fountain syndrome". WebMD. 2011. Retrieved 30 April 2012. External links

Online Mendelian Inheritance in Man (OMIM): 229120