[A case report of cervical disc hernia presenting fecal incontinence evoked by walking; spinal intermittent rectal dysfunction].

Intermittent clinical manifestations, the representative one of which is claudication, can be classified into two types; neurogenic and vasculogenic. Although cauda equina lesions are well known as a neurogenic cause, spinal disorders, especially cervical or thoracic cord lesions, have been paid more attention to by several authors recently. We encountered a 42-year-old man with cervical soft disc hernia and ossification of longitudinal ligament, who showed intermittent rectal dysfunction evoked by walking. This peculiar clinical manifestation successfully disappeared after surgical decompression of the spinal cord. Such an interesting case has not been reported in the world literature. The patient was admitted because of numbness in both hands. Neurological examinations on admission showed neither motor weakness nor abnormally increased tendon reflex. Hypesthesia and hypalgesia were noticed below the Th4 dermatome on both sides. Adding to those symptoms, he complained of fecal incontinence evoked by walking 100 meters. This rectal dysfunction became gradually worse. At last he showed fecal incontinence after walking only 10 meters. This was ten days after his admission. Myelogram and computed tomographic scan revealed a cervical soft disc hernia at the C5/6 level and findings of OPLL at the C5 and C6 level. Anterior cervical approach for OPLL and soft disc was used for bone graft insertion from the C4 to the C7 vertebral body. The rectal dysfunction completely disappeared after the operation. The possible mechanisms of intermittent rectal dysfunction evoked by walking were discussed.