Aneurysmal bone cyst - sacrum

Case contributed by Dr Chris O'Donnell


7 months of low back pain and waddling gait

Patient Data

Age: 12 years
Gender: Male

Expansile lytic lesion in left body of the sacrum. 

Nuclear medicine

Delayed scan shows minimal isotope accumulation in the left sacrum. 

SPECT coronal slices show photopaenic lesion in left sacrum with foci of increased isotope accumulation. 


Typical features of ABC, i.e. expansile mass with large cavities containing fluid/fluid levels indicating blood product. Minimal peripheral enhancement of the cystic spaces.

Note the importance of performing pre contrast T1 fat sat as fluid has relatively high signal intensity.

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Case information

rID: 16615
Published: 3rd Feb 2012
Last edited: 16th Jul 2018
Inclusion in quiz mode: Included

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