This is a 3 years old boy who presented with an expansile osteolytic lesion in the glenoid of the left scapula. The MRI shows fluid fluid levels, but these do not occupy the entire lesion. On the contrast study, the sagittal image shows heterogeneous enhancement.
This patient needs a biopsy irrespective of our pre-procedure diagnosis, given that the findings are atypical, which means that other conditions like telangiectatic osteosarcoma also need to be ruled out, though the patient is a little too young for this diagnosis.

The CT scan shows an expansile lesion. A biopsy was performed with an 18G coaxial needle in the prone position. The diagnosis was a giant cell containing tumor consistent with aneurysmal bone cyst (ABC). #CTbiopsy #ABC #aneurysmalbonecyst #fluidlevels