Prominent deltoid muscle insertion
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Shoulder pain post fall.
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Comminuted three-part fracture of the proximal humerus involving the surgical neck, and greater and lesser tuberosities with moderate impaction. Incidental localized cortical thickening of the lateral humeral midshaft at the insertion site of the deltoid muscle.
Prominent deltoid muscle insertions often resembles periostitis and may be mistaken for a lesion.