Abstract:
BACKGROUND:Although mirror pain occurs after cordotomy in patients experiencing unilateral pain via a referred pain mechanism, no studies have examined whether this pain mechanism operates in patients who have bilateral pain. OBJECTIVE:To assess the usefulness of cordotomy for bilateral pain from the viewpoint of increased pain or new pain caused by a referred pain mechanism. METHODS:Twenty-six patients who underwent percutaneous cordotomy through C1-C2 for severe bilateral cancer pain in the lumbosacral nerve region were enrolled. Pain was dominant on 1 side in 23 patients, and pain was equally severe on both sides in 3 patients. Unilateral cordotomy was performed for the dominant side of pain, and bilateral cordotomy was performed for 13 patients in whom pain on the nondominant side developed or remained severe after cordotomy. RESULTS:After unilateral cordotomy, 19 patients (73.1%) exhibited increased pain, which for 14 patients was as severe as the original dominant pain. After bilateral cordotomy, 7 patients (53.4%) exhibited new pain, which was located cephalad to the region rendered analgesic by cordotomy and was better controlled than the original pain. No pathological organic causes of new pain were found in any patient, and evidence of a referred pain mechanism was found in 3 patients after bilateral cordotomy. CONCLUSION:These results show that a referred pain mechanism causes increased or new pain after cordotomy in patients with bilateral pain. Nevertheless, cordotomy can still be indicated for patients with bilateral pain because postoperative pain is better controlled than the original pain.
journal_name
Neurosurgeryjournal_title
Neurosurgeryauthors
Higaki N,Yorozuya T,Nagaro T,Tsubota S,Fujii T,Fukunaga T,Moriyama M,Yoshikawa Tdoi
10.1227/NEU.0000000000000593subject
Has Abstractpub_date
2015-03-01 00:00:00pages
249-56; discussion 256; quiz 256-7issue
3eissn
0148-396Xissn
1524-4040journal_volume
76pub_type
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