Case of the Week - Patient Summary 6088Peer Reviewed and Certified -
MRI examination of the left shoulder following the
administration of intravenous contrast.
No rotator cuff or labral pathology noted. Degenerative changes of acromioclavicular joint are noted.
There is marrow replacement demonstrated in the humeral metaphysis over a 4.1-cm superior to inferior extent, that does not cross the physeal plate. There is shallow endosteal scalloping and increased signal on fat-suppressed T1-weighted images consistent with proteinaceous material. Minimal expansion is seen
anteriorly at the level of the bicipital groove. There is a thin rim of low signal surrounding this lesion, consistent with sclerosis. There is no evidence of pathologic fracture.
Aneurysmal bone cyst
Simple (Solitary or Unicameral) Bone Cyst 