INDICATIONS AND RESULTS OF VERTEBRAL SHORTENING PROCEDURES ON THE METASTATIC SPINE

Abstract

Purpose of the study: We report a series of 12 patients who underwent surgery in 2003 or 2004 for spinal shortening as treatment for thoracic or lumbar metastasis.

Material and method: This series included seven females and five males, mean age 56.5 years (range 34–80 years). The operation was a resection of the vertebral body in a one-stage procedure. A simple posterior approach was used for two patients and a wider costotransversectomy approach was required for ten. Posterior fixation was installed with pedicle screws in the two vertebrae above and two below the resection. Mean operative time was 343 minutes (range 260–420 min). Mean blood loss was 2380 cc (range 600–5000). There were few surgery-related complications: one dural breach and one pulmonary breach.

Results: The decision to undertake surgery was made on the basis of neurological problems in seven patients. All patients were Frankel class C, unable to walk. Among these patients, five died in less than six months. For the two survivors, they were scored 7 on the Tokuhashi scale. The remainder scored 5. For the two survivors, one recovered walking capacity (Frankel D) and the other achieved a normal status (Frankel E). The five other patients underwent surgery for pain related to a kyphosis callus threatening the cord. We used the Karnofsky and the Oswestry score to analyze outcome. The score did not regress in any of the patients after surgery. Three patients improved their score significantly. The three others had an unchanged score. The best correction of the kyphosis callus was obtained when the vertebral collapse was greater than 50%. The preoperative regional deformity was measured at 23.2° (range 15–35°) which postoperatively reached 0.5° (range 20 to −17°).

Conclusion: This technique for spinal shortening appears to be a better alternative to anterior reconstruction, especially when the vertebral collapse is greater than 50%. In this context, this palliative surgery enables improved quality-of-life for a patient with often advanced disease.