The value of posterior decompression by laminectomy for malignant tumors of the spine.

A 20-year experience of decompression laminectomies is reviewed by studying the results from two teaching hospitals. Seventy percent of the patients received no benefit from the surgery. Thirty percent noted some improvement but their average survival time was limited to 18 weeks. This is not a very profitable procedure when considering associated neurological changes; the patient's longevity should be considered before recommending decompressive laminectomy.