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The MRI sequences demonstrate a lobulated soft tissue mass of the left scapular and infrascapular regions (measuring 110 x 95 x 50 mm) centred on the infraspinatus and teres minor and extending to the latissimus dorsi and teres major muscles. It elicits a low signal on T1, high signal on T2 with restricted diffusion and heterogeneous enhancement on post-contrast sequences. No endothoracic extension is seen.