M.R. imaging of aneurysmal bone cysts

ABSTRACT

6 patients with aneurysmal bone cysts were evaluated by plain films, CT and MRI. The study consists of 3 parts. The first part evaluated the appearance of aneurysmal bone cysts and revealed that MRI showed that characteristic appearance in the form of bone expansion, cortical thinning, lobulation, multiple cavities or compartments containing hematomas of variable ages, fluid/fluid level suggestive of chronic hematomas and the presence of a thin rim of low signal intensity lining the aneurysmal bone cysts. The second part of the study compared CT with MRI, while the third part of the study evaluated the hemodynamic changes within aneurysmal bone cysts. To determine the hemodynamic changes or the presence of low flow within those compartments or blood-filled spaces, post-contrast CT and post- gadolinium DTPA MR studies, as well as flow sensitive MR images, were performed