Spinal subdural extramedullary masses: myelography, CT myelography and MRI diagnosis

ABSTRACT

13 conventional myelographic examinations were performed, 7 myelographic CT studies and 4 MRE examinations on 16 cases of subdural extramedullary mass lesions. The lesions were 6 meningioma, 7 neurinoma, 2 lipomas and 1 subdural deposit. The diagnostic criteria of subdural extramedullary mass in myelography, CT myelography and in MRI as well as the differential diagnosis of the different pathological subdural mass lesions were discussed. Subdural extramedullary mass lesions can be easily diagnosed by myelography and CT myelography as well as by MRI. However, MRI has proven to be the procedure of choice in the diagnosis of such lesions