Aneurysmal bone cyst

Case contributed by Dr Mohammad A. ElBeialy


Hisory of trauma to the right hip and previous operation. Right hip pain with difficulty in hip flexion and extension.

Patient Data

Age: 12 years
Gender: Female
Right acetabular, superior pubic ramus and adjoining right iliac bone expansile multilocular cystic lesion with thin non-sclerotic rim and marked cortical expansion, yet with no definite cortical breakthrough.

The right acetabulum as well as the adjoining superior pubic ramus and right iliac bones show multi-locular expansile cystic lesion with thin non-sclerotic rim and narrow zone of transition. No evident  cortical break through or extra-osseous soft tissue component. The lesion shows hypointense T1 and hyperintense T2 / STIR signal with typical characteristic fluid / fluid levels.  The lesion is seen, predominantly within the pelvic cavity with indentation of urinary bladder. Mild right hip joint effusion.  Normal proximal right femur with smooth regular outline. Normal left hip. 

Case Discussion

Right acetabulum and adjoining superior pubic ramus and right iliac bone aneurysmal bone cyst.

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Case information

rID: 23518
Published: 20th Jun 2013
Last edited: 26th Feb 2016
Inclusion in quiz mode: Included

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