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Abstract
The purpose of this study was to assess the natural history of sciatica due to lumbosacral nerve root compromise and to evaluate the pathomorphologic changes that accompany the natural resolution of the disease. One hundred and sixty-five consecutive patients, 114 males and 51 females, with an average age of 41 years (range 17-72) and an average duration of symptoms of 4.2 months (range 1 -72) presenting with sciatica thought to be due to lumbosacral nerve root compromise were admitted to the study. The cornerstone of treatment was the serial epidural administration of steroid and local anaesthetic by the caudal route on an outpatient basis. Lumbar epidural injection or periradicular infiltration at the appropriate level, confirmed under image intensifier, was the next step before considering surgical decompression. An average of three injections (range 0-8) was received by each patient. Patients underwent clinical examination and computed tomography. Twenty-three patients (14%) underwent surgical decompression. The remainder were clinically assessed at one year after presentation, and 111 were rescanned at the appropriate levels. AH conservatively managed patients made a satisfactory clinical recovery: average reduction of pain on the visual analogue scale was 94% (range 45-100) and 64 (76%) of the 84 disc herniations and 7 (26%) of the 27 disc bulges showed partial or complete resolution (chi-square=20.27, P=00001). Thus a high proportion of patients with discogenic sciatica make a satisfactory recovery with aggressive conservative management, and this recovery is accompanied by resolution of disc hernations in a significant number. Only a small proportion of patients needed surgical decompression.