Aneurysmal Bone Cyst

Question 1

What is an aneurysmal bone cyst?

Answer 1

A benign and non-neoplastic reactive bone lesion filled with multiple blood-filled cavities; 75% in pts <20yo

Question 2

What are the imaging and histiologic chracteristics of an aneurysmal bone cyst (ABC)?

Answer 2

1) Expansile, eccentric lesion “bubbly appearance”; usually metaphysis
2) fluid lines on MRI, CT
3) Blood filled spaces w/o endothelial lining; may have giant cells or spindle cells

Question 3

What is the treatment for ABC (aneurysmal bone cyst)?

Answer 3

Curettage and bone grafting; fractures are treated non-op until healed