Results of Treatment of the Lateral Nerve Root Entrapment (Lateral stenosis)

Since 1970, in Japan, there have been many reports regarding to the results of conservative and operative treatments of spinal canal stenosis. But there are very few reports describing lateral nerve root entrapment (lateral stenosis) in which nerve root is constricted in the lateral recess.From August, 1981 to July, 1985, we experienced 13 cases of lateral nerve root entrapment including 6 males and 7 females. An average age at the time of operation was 58 years old. Neurologic abnormalities were diagnosed by myelography, discography and nerve root block. Method of operation were partial laminectomy for 7 cases, hemilaminectomy for 5 cases. Postoperative results were good.