| Among the neoplastic lesions, both primary and metastatic malignancies must be considered. |
| Four weeks later, a computed tomography scan showed spontaneous regression of some of the metastatic lesions. |
| The differential diagnosis included metastatic lymphoma, epidural abscess, hematoma, and vascular malformation. |
| Prior radiation therapy was acceptable, but prior chemotherapy for metastatic disease was not allowed. |
| General examination to exclude generalised lymphadenopathy or metastatic disease should then be undertaken. |
| Plain radiographs are less sensitive for metastatic lesions than are other imaging tests. |
