Aneurysmal Bone Cyst UHRAD Case 78

Description: Clinical History:12-year-old Hispanic female complaining of a three week history of low back pain radiating to the anterior portion of the left thigh. Pain worsens while walking. Denies fever. Findings: Large expansile lytic lesion involving the posterior elements of the L3 vertebra. This lesion extends into the posterior 2/3 of the L3 vertebral body with sparing of the anterior aspect. A large expansile component extends into the left paraspinal muscles. The lesion measures 5.0 x 7.5 x 5.6 cm in AP, transverse and craniocaudad dimensions. Fine septations are seen within the expansile portion of the mass. The borders are lobulated with a thin calcific rim. Small flecks of calcification are identified within the lesion. There is mass effect upon the thecal sac. UHRAD