The cause of failure in high cervical percutaneous cordotomy: an analysis.

Factors that might have contributed to failure of high cervical percutaneous cordotomy in 23 patients with intractable pain were investigated. Cordotomy failed in 3 patients, 20 had initially good pain relief (87%). True recurrence occurred in 5 patients, 3 of them developed pain elsewhere. Analysis of these three types of failure showed a purely technical cause in 2 cases; other failures or recurrences were due to the underlying disease being not strictly unilateral, or possibly to the existence of other ascending pathways carrying nociceptive impulses apart from the spinothalamic tract. There was no influence of age, sex, type of cancer or previous medication on the result of percutaneous cordotomy. Patients with plexus involvement did better than those with bone metastasis.