Aneurysmal Bone Cyst

Description: My Child has - series from Boston Childrens Hospital An aneurysmal bone cyst is a blood-filled fibrous tumor-like cyst that expands the bone, giving it a "blow-out" appearance. It typically occurs in the second decade of life and can emerge in virtually any bone in the arms, legs, trunk or skull. The vertebrae and knee are the most common sites of occurrence. An aneurysmal bone cyst is a benign bone tumor, meaning that it does not metastasize (spread) to other regions of the body. It can however be quite destructive locally and has a high propensity for recurrence.