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Using Cox models, we established a new prognostic system based on simple clinical parameters in a training series of 232 patients whose diagnoses were made before 1989. Adverse prognostic factors for survival (P <.01) were age 65 years or older, male gender, albumin level lower than 40 g/L, hemoglobin level lower than 12 g/dL, platelet count less than 150 x 10(9)/L, white blood cell count less than 4 x 10(9)/L, high number of cytopenias, and hepatomegaly. Taking age (age 65 years or older, 1 point; younger than 65 years, 0 points), albumin (less than 40 g/L, 1 point; 40 g/L or more, 0 points), and total number of cytopenias (no cytopenia, 0 points; 1 cytopenia, 1 point; 2 or 3 cytopenias, 2 points) into account, we separated the 232 patients into 3 groups with low (score 0 or 1), intermediate (score 2), or high (score 3 or 4) risk, associated with 5-year survival rates at 87%, 62%, and 25%, respectively (P <.0001). Only the presence of 2 or 3 cytopenias was an independent prognostic factor among patients younger than 65 years (P <.0001). Albumin level lower than 40 g/L and the presence of 1 or more cytopenia defined a prognostic system for patients 65 years and older. Patients at low risk, intermediate risk, and high risk had 5-year survival rates at 92%, 63%, and 27%, respectively (P <.0001). The 3 prognostic systems separated the 167 patients of a test series in groups with significantly different survival rates. The overall scoring system retained a significant prognostic value in 86 additional patients treated between 1990 and 1996. We conclude that the combination of age, albumin level, and blood cell counts might help to select patients with Waldenström macroglobulinemia for treatment and to evaluate therapeutic results.

patients with the description of a new scoring system and its validation on 253 other patients.