An expansile mildly lobulated and septated lesion is seen within the proximal humeral metadiaphysis. The lesion shows low to intermediate T1 and high T2/STIR signal intensity with T1/T2 hypointense sclerotic rim. The lesion measures 11 X 3 X 3 cm in its main CC,TS and AP diameters. The lesion shows endosteal scalloping with sclerosed margin and narrow zone of transition. Focal cortical destruction is noted with small extra-osseous soft tissue component at the anterolateral aspect of the lesion. No fluid / fluid levels are seen. The lesion shows heterogenous post-contrast enhancement with enhancing septa.