Lorenz Büchler, Harish Hosalkar, Martin Weber, Arthroscopically Assisted Removal of Intraosseous Ganglion Cysts of the Distal Tibia, Clinical Orthopaedics and Related Research®, 10.1007/s11999-009-0771-4, 467, 11, (2925-2931), (2009). The cysts were curetted and filled with artificial bone (β-TCP). They are pockets of joint fluid that develop outside of the joint under tears of the labrum.These are also known as ganglia (or a ganglion). Because activity can cause the ganglion cyst to get larger, it may help to temporarily immobilize the area with a brace or splint. Consequently, the shoulder pain was resolved promptly without suprascapular nerve complications, and the cyst was histologically diagnosed as an intraosseous ganglion. This report describes a case of an intraosseous ganglion of the proximal humerus. Direct communication between a cyst and joint is not commonly seen. Commonly these lesions are found just beneath the attachments of the cruciate ligaments and are frequently associated with similar appearing soft-tissue ganglia nearby or with additional intraosseous ganglia in the vicinity [2]. Consequently, the shoulder pain was resolved promptly without suprascapular nerve complications, and the cyst was histologically diagnosed as an intraosseous ganglion. Recently, a simple and safe less invasive arthroscopic approach was reported for patients with spinoglenoid ganglion cysts [11]. The only selection criterion was the description of an intramuscular cyst or ganglion. In both cases, the genesis of the intraosseous ganglion cyst may be related to a long-term impingment between the greater tuberosity of the humerus and the acromion. Her symptoms did not improve after non-operative treatment. Most cysts (94%) demonstrated communication with the joint post-arthrogram. The histological examination of cystic mass was expressed as ganglion. Intraosseous ganglia are rare lesions that can cause pain and leave patients susceptible to pathologic fracture. Intraosseous ganglion (IOG) cysts of the humerus is a rare and often painful condition. There was no communication between the cyst and the joint space. Institutional review board approval was obtained. A 47-year-old man with left shoulder pain developed an intraosseous cyst in the left glenoid, which came into contact with the suprascapular nerve. Your doctor may suggest a watch-and-wait approach. (5-9) There is only one other case in the literature describing an IOG cyst of the humerus, while most papers describe cystic lesions of the carpal and tarsal bones. Postero-superior intraosseous cysts of the humeral head were detected in 73.3% of all javelin throwers in the dominant shoulder, but only in 13.3% in the nondominant shoulder (P = .008). 1, 2 The pathogenesis of intraosseous ganglion cysts remains unclear, and these cysts fall into 2 categories: the primarily intraosseous “idiopathic” type and the penetrating type. 4A, 4B) are fluid-filled masses arising in the setting of a long-standing full-thickness rotator cuff tear. Intervention and outcome: A trial of passive care was conducted, including soft tissue therapy, spinal Lennard Funk, 2011. ... Intraosseous ganglion cyst in which fibrous wall is of variable thickness with myxoid change. 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