Fifty-seven such patients were identified, 13 (23%) of whom had confirmation of cauda equina syndrome on MRI scanning. The DRE did not significantly discriminate for the outcome of MRI (p = 0.897, test accuracy 51%, diagnostic odds ratio 1.42). There was no correlation between the cumulative number of positive clinical findings in an individual patient and the likelihood of MRI diagnosis and no significant link between any individual clinical feature and the MRI result.