From the case:
Hereditary multiple exostoses - shoulder osteochondromas
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Frontal view of the left shoulder shows expansion of the proximal left humeral diametaphysis with a ground glass matrix and adjacent cortical thinning. There is a left proximal humeral bony excrescence as well as a protrusion of the cortex medially. In addition, there is a bony protuberance projecting from the medial mid left scapula.
Case Discussion
These findings are suggestive of hereditary multiple exostoses (HME), which is characterized by the presence of multiple osteochondromas.