Arthroscopic marginal resection of a lipoma under the supraspinatus muscle: a case report

Abstract

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Subdeltoid Lipoma Associated With Subscapularis Tear Successfully Treated With Arthroscopic Resection and Cuff Repair: A Case Report

“…Lipoma is one of the most common soft-tissue tumors; it is predominantly located in the subcutaneous tissues [ 14 ]. However, there are few reports that intramuscular lipoma in the supraspinatus muscle could be associated with subacromial impingement due to the thickening of the supraspinatus muscle [ 8 - 11 ]. In our case, the tumor was located adjacent to the subscapularis insertion, and the growing mass in this limited space could have compressed the subscapularis tendon, causing coracoid impingement and ultimately leading to the subscapularis tear.…”

“…In addition, a case report by Nakamura et al published in 2021 described a patient who presented with a case of lipoma under the supraspinatus muscle, which was located in the supraspinatus fossa where the suprascapular nerve runs. The authors reported successful arthroscopic resection of the lipoma combined with suprascapular nerve release [ 8 ]. In our case, the lipoma occurred deep to the deltoid muscle, concomitant with a subscapularis tear.…”

“…Lipomas are the most common benign soft tissue tumors in the shoulder region, which are most commonly located in subcutaneous tissue [ 7 ]. There have been few reports of intramuscular lipoma within supraspinatus causing subacromial impingement [ 8 - 11 ]. To our knowledge, there have been no previous reports of lipomas in the subdeltoid space causing subscapularis tears.…”

“…Open resection with marginal excision is the classic surgical approach for lipoma resection [ 12 , 13 ]. Arthroscopic marginal resection of intramuscular lipoma in the shoulder area has also been reported but focusing mainly on lipomas within the supraspinatus muscle [ 8 , 9 ].…”