The diagnosis of herniated thoracic disks has historically been confusing for the clinician and difficult for the radiologist. Its protean manifestations lead it to mimic many diseases including spinal cord tumors and degenerative diseases. Radiographically, its diagnosis has been difficult by both routine radiography and myelography. Our two cases demonstrate post-metrizamide (Amipaque) myelogram computed tomography to be a valuable aid in the diagnosis of herniated thoracic disks.