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Abstract
In patients with diffuse large cell lymphoma treated with chemotherapy the presence of high levels of serum beta 2 microglobulin has been considered as a bad prognostic factor. Until now, attempts to detect early relapse in patients with diffuse large cell lymphoma have been sparse. To address this issue we began a prospective clinical trial to evaluate the role of different clinical, laboratory and radiographic tests in the detection of early relapse in non-Hodgkin's lymphoma (NHL).
Only serum beta 2 microglobulin levels had clinical significance and 26 of 53 patients (49%) had abnormal levels, 3 to 23.1 months (mean 8.5 months) before evident relapse. Elevated serum lactic dehydrogenase (LDH) levels and beta 2 microglobulin were observed in six patients and all relapsed, suggesting that the combination of these two tests should be considered in future prospective clinical trials in order to define the utility of both tests to detect early relapse. This information may allow us to begin chemotherapy when the tumor mass is still low thereby making the probability of achieving a long second remission more likely.