End-result study of the intervertebral disc.

In a series of 843 operations for removal of an injured intervertebral disc, 67 per cent. of the patients were males. The operation afforded good results in 67.5 per cent. of the patients examined. Of those not examined but surveyed by questionnaire, apparently good results had been obtained in 59.5 per cent. Twenty patients required multiple operations for recurrences, in a series of 147 who returned for examination. Roentgenographic interpretations are not reliable for accurate localization of the lesion.