Meletios A. Dimopoulos, MD; Bart Barlogie, MD; Terry L. Smith, MS; Raymond Alexanian, MD
▪ Objective: To evaluate serum lactate dehydrogenase (LDH) as a prognostic factor in previously untreated patients with multiple myeloma.
▪ Design: Study of 391 consecutive patients with uniformly treated multiple myeloma, followed until death in 63% of patients.
▪ Setting: Tertiary, referral cancer center.
▪ Patients: A total of 391 consecutive, previously untreated, symptomatic patients with various stages of multiple myeloma.
▪ Intervention: Various chemotherapy regimens that included doxorubicin or glucocorticoids, or both, with a consistent response rate (53%).
▪ Measurements: Outcomes included clinical response based on a 75% reduction of calculated tumor load and survival time from treatment. Univariate and multivariate analyses were used.
▪ Main Results: Eleven percent of patients showed a high serum LDH level of more than 5.0 µkat/L (300 U/L). An elevated LDH level was seen more frequently with a rise in the tumor load; an increased level was present in 26% of patients with high tumor mass. A high LDH level was associated with plasma cell leukemia or lymphoma-like clinical features (43%) and with plasma cell hypodiploidy (17%). Only 20% of patients with elevated LDH levels responded to chemotherapy compared with a response rate of 57% for patients with low levels of LDH. Using multivariate analysis, LDH was a significant independent predictor of response (P = 0.001), with an odds ratio of 0.25 (95% Cl, 0.11 to 0.57). A high LDH level was associated with a short median survival (9 months) and showed the highest relative risk (2.63; Cl, 1.75 to 3.95; P = 0.001).
▪ Conclusions: Elevation of the LDH level suggests the presence of occult extraosseous disease and high tumor mass. The LDH level is a predictor of a poor prognosis in selected patients who should be considered for early intensive treatment.
Dimopoulos MA, Barlogie B, Smith TL, Alexanian R. High Serum Lactate Dehydrogenase Level as a Marker for Drug Resistance and Short Survival in Multiple Myeloma. Ann Intern Med. ;115:931–935. doi: 10.7326/0003-4819-115-12-931
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Published: Ann Intern Med. 1991;115(12):931-935.
Hematology/Oncology, Multiple Myeloma.
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Print ISSN: 0003-4819 | Online ISSN: 1539-3704
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