A heterogeneous intramedullary lesion is noted involving the right humeral head and neck, which is hypointense on T1 and hyperintensity on T2-weighted sequences with heterogeneous postcontrast enhancement on T1 C+ fat sat. This is extending downwards to involve the rest of the medullary cavity of the humerus with heterogeneous postcontrast enhancement.
Permeative cortical destruction is noted with surrounding subperiosteal soft tissue proliferation. The lateral scapula including the glenoid is also affected by the same process.