NEW HAVEN, Connecticut‘‘We’ve hit the wall in management of small- cell lung cancer (SCLC). We need a paradigm shift," John R. Murren, MD, stated. He is associate professor of medicine at Yale University School of Medicine in New Haven, Connecticut.
"Escalated-dose trials have shown that intensification to the maximum tolerated dose (MTD) of cyclophosphamide(Drug information on cyclophosphamide) (Cytoxan, Neosar), doxorubicin(Drug information on doxorubicin) (Adriamycin), and vincristine (Oncovin) (CAV) or etoposide(Drug information on etoposide) (VePesid) and cisplatin(Drug information on cisplatin) (Platinol)(EP) increases toxicity without impact on survival. Dose intensification by interval compression improves survival, but chemotherapy must be given without excessive toxicity, and both the regimen and patient factors define the risk of toxicity," he continued.
Risk Factors of Early Death with Chemotherapy
Dr. Murren reviewed four studies of risk factors associated with early death with chemotherapy. These were conducted by the Manchester Lung Study Group, the London Lung Study Group, the Medical Research Council (MRC) Lung Cancer Working Party, and the Copenhagen Lung Cancer Group.
The MRC study of deaths in the first 3 weeks of chemotherapy found that risk of death was greatest for patients with performance status (PS) of 2 or greater, white blood cell count of 10,000/µL or higher, or undergoing treatment with four or more drugs. "There was 16.7% excess mortality in the high-risk group during the second week of treatment, and 3-year survival in this group was only 0.6%," Dr. Murren said.
The Copenhagen Lung Cancer Group study found that early death was associated with age of 65 or older, performance status of 3 or 4, or lactate dehydrogenase (LDH) levels higher than two times normal. "In the high risk group, median survival time was 133 days, and 2-year survival was 4%. Mortality during the first chemotherapy cycle was 33% and was as high as 41% with certain chemotherapy combinations," Dr. Murren explained. "More than half of early deaths occurred in elderly patients with high LDH and good performance status."