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Ewings sarcoma
1%
34/3352
Osteosarcoma
3%
112/3352
Simple bone cyst
19/3352
Aneurysmal bone cyst
92%
3085/3352
Unicameral bone cyst
92/3352
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The radiographs, MRI, and histology are consistent with an aneurysmal bone cyst. While the radiographs could be interpreted in many ways, the "fluid-fluid" levels seen on the axial MRI are semi-diagnostic. The histology slide shows the "lakes of blood" within a fibrous stroma and adjacent normal appearing bone consistent with an aneurysmal bone cyst. Kaila et al. evaluated pediatric shoulder girdle aneurysmal bone cyst management and outcomes with a review of the literature and evaluation of their own patient cohort from 1998 to 2004. They found the proximal humerus and clavicle to be the most frequently affected areas about the shoulder. The authors found a high percentage of local recurrence from tumors of the proximal humerus lesions.
4.4
(23)
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