Fluid fluid level containing bone lesions
Dr Yuranga Weerakkody and Dr Frank Gaillard et al.
Fluid-fluid levels within a bone lesion are best seen on MRI, although with narrow window width they can also be appreciate on CT. Their prevalence is estimated at ~ 3 % of bone and soft tissue tumours 4.
Their presence is non-specific as they be seen in both benign and malignant lesions.
The differential includes:
-
aneurysmal bone cyst (ABC)
- primary
- secondary to other underlying lesions such as
- simple bone cyst - especially after fracture
- telangiectatic osteosarcoma
- uncommon
- metastasis - especially from renal cell carcinoma (RCC) 2 and lung cancer 3
- synovial sarcoma
- synovial haemangioma
- myositis ossificans
- adamantinoma 5
- neurogenic tumours 3
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