Fig. 1

Magnetic resonance imaging (MRI) of the proximal left humerus. a Sagittal, b coronal, and c transversal MRI of the proximal left humerus. MRI shows a 70 × 40 mm mass, with an unclear boundary and mixed hyperintense signals on T2-weighted imaging (T2WI) and hyperintense signals on T1-weighted imaging (T1WI) of the proximal left humerus