This randomized trial of 283 patients with 6 to 12 weeks of severe sciatica compared early microdiskectomy surgery with a strategy of prolonged conservative treatment with eventual surgery if needed. Patients who had early surgery reported faster recovery and more rapid improvement in leg pain. After 1 year, the outcomes in the two groups were similar, and 95% of the patients in both groups reported recovery.

This clinical trial compared surgical treatment with nonsurgical treatment of spondylolisthesis. Because of extensive patient crossover, the data were essentially nonrandomized, and as-treated analyses were performed. During 2 years of follow-up, patients treated surgically had greater improvement in pain and function than those treated nonsurgically. Patients treated nonsurgically showed moderate improvement over time.

This large, multicenter trial compared temsirolimus with interferon alfa alone and with a combination of the two drugs in patients with newly diagnosed metastatic renal-cell cancer and a poor prognosis. As compared with interferon alfa or combination therapy, temsirolimus was associated with a moderate improvement in survival among these high-risk patients.

This open-label, uncontrolled, 25-year study of treatment with sodium phenylacetate and sodium benzoate documents overall survival of 84% in historically lethal urea-cycle disorders characterized by acute hyperammonemic episodes. When episodes are promptly recognized and treated with this therapy, together with intravenous arginine hydrochloride and adequate calories to prevent catabolism, plus dialysis when necessary, plasma ammonium levels fall, markedly improving survival.