MRI-documented spontaneous regression of cervical disc herniation: a case report and review of the literature.

Spontaneous regression of the herniated lumbar discs is a well-established phenomenon. This phenomenon of disappearance of the disc has been reported occasionally in the cervical spine and very rarely in the thoracic regions. In this article, we report the rare occurrence of spontaneous resolution of one large herniated cervical disc (C6-7) with simultaneous progression of another disc prolapse (C4-5) in a 46-year-old man.